20112122121112 has 16 divisors (see below), whose sum is σ = 43097404545360. Its totient is φ = 8619480909024.

The previous prime is 20112122121103. The next prime is 20112122121131. The reversal of 20112122121112 is 21112122121102.

It is a happy number.

It is a super-2 number, since 2×20112122121112² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20112122121112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179572518883 + ... + 179572518994.

It is an arithmetic number, because the mean of its divisors is an integer number (2693587784085).

Almost surely, 2^{20112122121112} is an apocalyptic number.

It is an amenable number.

20112122121112 is an abundant number, since it is smaller than the sum of its proper divisors (22985282424248).

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

20112122121112 is a wasteful number, since it uses less digits than its factorization.

20112122121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359145037890 (or 359145037886 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 20112122121112 its reverse (21112122121102), we get a palindrome (41224244242214).

The spelling of 20112122121112 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twelve".