20111212110122 has 32 divisors (see below), whose sum is σ = 36505490158080. Its totient is φ = 8111839968000.

The previous prime is 20111212110113. The next prime is 20111212110133. The reversal of 20111212110122 is 22101121211102.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 20111212110122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6703247 + ... + 9227997.

It is an arithmetic number, because the mean of its divisors is an integer number (1140796567440).

Almost surely, 2^{20111212110122} is an apocalyptic number.

20111212110122 is a deficient number, since it is larger than the sum of its proper divisors (16394278047958).

20111212110122 is a wasteful number, since it uses less digits than its factorization.

20111212110122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558246.

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

Adding to 20111212110122 its reverse (22101121211102), we get a palindrome (42212333321224).

The spelling of 20111212110122 in words is "twenty trillion, one hundred eleven billion, two hundred twelve million, one hundred ten thousand, one hundred twenty-two".