22111220111012 has 6 divisors (see below), whose sum is σ = 38694635194278. Its totient is φ = 11055610055504.

The previous prime is 22111220111009. The next prime is 22111220111033. The reversal of 22111220111012 is 21011102211122.

It can be written as a sum of positive squares in only one way, i.e., 21603216101476 + 508004009536 = 4647926^2 + 712744^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2763902513873 + ... + 2763902513880.

It is an arithmetic number, because the mean of its divisors is an integer number (6449105865713).

Almost surely, 2^{22111220111012} is an apocalyptic number.

It is an amenable number.

22111220111012 is a deficient number, since it is larger than the sum of its proper divisors (16583415083266).

22111220111012 is a wasteful number, since it uses less digits than its factorization.

22111220111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5527805027757 (or 5527805027755 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 22111220111012 its reverse (21011102211122), we get a palindrome (43122322322134).

The spelling of 22111220111012 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty million, one hundred eleven thousand, twelve".