20121001222122 has 32 divisors (see below), whose sum is σ = 44878329941760. Its totient is φ = 6682251323520.

The previous prime is 20121001222109. The next prime is 20121001222151. The reversal of 20121001222122 is 22122210012102.

It is a happy number.

20121001222122 is a `hidden beast` number, since 201 + 210 + 0 + 12 + 221 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20121001222095 and 20121001222104.

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, 687459783 + ... + 687489050.

It is an arithmetic number, because the mean of its divisors is an integer number (1402447810680).

Almost surely, 2^{20121001222122} is an apocalyptic number.

20121001222122 is an abundant number, since it is smaller than the sum of its proper divisors (24757328719638).

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

20121001222122 is a wasteful number, since it uses less digits than its factorization.

20121001222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374949115 (or 1374949109 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20121001222122 its reverse (22122210012102), we get a palindrome (42243211234224).

The spelling of 20121001222122 in words is "twenty trillion, one hundred twenty-one billion, one million, two hundred twenty-two thousand, one hundred twenty-two".