21201120102122 has 16 divisors (see below), whose sum is σ = 32352625046592. Its totient is φ = 10417865771040.

The previous prime is 21201120102091. The next prime is 21201120102131. The reversal of 21201120102122 is 22120102110212.

It is a super-3 number, since 3×21201120102122³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21201120102122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238459808 + ... + 238548699.

It is an arithmetic number, because the mean of its divisors is an integer number (2022039065412).

Almost surely, 2^{21201120102122} is an apocalyptic number.

21201120102122 is a deficient number, since it is larger than the sum of its proper divisors (11151504944470).

21201120102122 is a wasteful number, since it uses less digits than its factorization.

21201120102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477008893.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21201120102122 its reverse (22120102110212), we get a palindrome (43321222212334).

The spelling of 21201120102122 in words is "twenty-one trillion, two hundred one billion, one hundred twenty million, one hundred two thousand, one hundred twenty-two".