20211222120102 has 80 divisors (see below), whose sum is σ = 48809246529120. Its totient is φ = 6214064024448.

The previous prime is 20211222120101. The next prime is 20211222120121. The reversal of 20211222120102 is 20102122211202.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211222120101) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 938527 + ... + 6426762.

It is an arithmetic number, because the mean of its divisors is an integer number (610115581614).

Almost surely, 2^{20211222120102} is an apocalyptic number.

20211222120102 is an abundant number, since it is smaller than the sum of its proper divisors (28598024409018).

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

20211222120102 is a wasteful number, since it uses less digits than its factorization.

20211222120102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7366619 (or 7366610 counting only the distinct ones).

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

Adding to 20211222120102 its reverse (20102122211202), we get a palindrome (40313344331304).

The spelling of 20211222120102 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty thousand, one hundred two".