1101223221012 has 18 divisors (see below), whose sum is σ = 2783647586538. Its totient is φ = 367074406992.

The previous prime is 1101223221011. The next prime is 1101223221013. The reversal of 1101223221012 is 2101223221011.

It is an interprime number because it is at equal distance from previous prime (1101223221011) and next prime (1101223221013).

It can be written as a sum of positive squares in only one way, i.e., 1059347328516 + 41875892496 = 1029246^2 + 204636^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101223221011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15294766923 + ... + 15294766994.

It is an arithmetic number, because the mean of its divisors is an integer number (154647088141).

Almost surely, 2^{1101223221012} is an apocalyptic number.

1101223221012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1101223221012 is an abundant number, since it is smaller than the sum of its proper divisors (1682424365526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1101223221012 is a wasteful number, since it uses less digits than its factorization.

1101223221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30589533927 (or 30589533922 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1101223221012 its reverse (2101223221011), we get a palindrome (3202446442023).

Subtracting 1101223221012 from its reverse (2101223221011), we obtain a palindrome (999999999999).

The spelling of 1101223221012 in words is "one trillion, one hundred one billion, two hundred twenty-three million, two hundred twenty-one thousand, twelve".