1011012101220 has 48 divisors (see below), whose sum is σ = 3088182420288. Its totient is φ = 245093842560.

The previous prime is 1011012101191. The next prime is 1011012101227. The reversal of 1011012101220 is 221012101101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1011012101196 and 1011012101205.

It is not an unprimeable number, because it can be changed into a prime (1011012101227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 765917599 + ... + 765918918.

It is an arithmetic number, because the mean of its divisors is an integer number (64337133756).

Almost surely, 2^{1011012101220} is an apocalyptic number.

1011012101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011012101220 is an abundant number, since it is smaller than the sum of its proper divisors (2077170319068).

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

1011012101220 is a wasteful number, since it uses less digits than its factorization.

1011012101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531836540 (or 1531836538 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1011012101220 its reverse (221012101101), we get a palindrome (1232024202321).

The spelling of 1011012101220 in words is "one trillion, eleven billion, twelve million, one hundred one thousand, two hundred twenty".