1221112002110 has 128 divisors (see below), whose sum is σ = 2951705401344. Its totient is φ = 351264360960.

The previous prime is 1221112002059. The next prime is 1221112002113. The reversal of 1221112002110 is 112002111221.

It is a super-2 number, since 2×1221112002110² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221112002113) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 93016367 + ... + 93029493.

It is an arithmetic number, because the mean of its divisors is an integer number (23060198448).

Almost surely, 2^{1221112002110} is an apocalyptic number.

1221112002110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221112002110 is an abundant number, since it is smaller than the sum of its proper divisors (1730593399234).

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

1221112002110 is a wasteful number, since it uses less digits than its factorization.

1221112002110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22458.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221112002110 its reverse (112002111221), we get a palindrome (1333114113331).

The spelling of 1221112002110 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, two thousand, one hundred ten".