22111220111010 has 64 divisors (see below), whose sum is σ = 56402157157632. Its totient is φ = 5528381966336.

The previous prime is 22111220111009. The next prime is 22111220111033. The reversal of 22111220111010 is 1011102211122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82290459 + ... + 82558718.

It is an arithmetic number, because the mean of its divisors is an integer number (881283705588).

Almost surely, 2^{22111220111010} is an apocalyptic number.

22111220111010 is an abundant number, since it is smaller than the sum of its proper divisors (34290937046622).

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

22111220111010 is a wasteful number, since it uses less digits than its factorization.

22111220111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164849467.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 22111220111010 its reverse (1011102211122), we get a palindrome (23122322322132).

The spelling of 22111220111010 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty million, one hundred eleven thousand, ten".