20211210122101 has 16 divisors (see below), whose sum is σ = 20336270572800. Its totient is φ = 20086302412800.

The previous prime is 20211210122057. The next prime is 20211210122111. The reversal of 20211210122101 is 10122101211202.

It is a cyclic number.

It is not a de Polignac number, because 20211210122101 - 2²⁵ = 20211176567669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211210122111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2645788840 + ... + 2645796478.

It is an arithmetic number, because the mean of its divisors is an integer number (1271016910800).

Almost surely, 2^{20211210122101} is an apocalyptic number.

It is an amenable number.

20211210122101 is a deficient number, since it is larger than the sum of its proper divisors (125060450699).

20211210122101 is a wasteful number, since it uses less digits than its factorization.

20211210122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15540.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20211210122101 its reverse (10122101211202), we get a palindrome (30333311333303).

The spelling of 20211210122101 in words is "twenty trillion, two hundred eleven billion, two hundred ten million, one hundred twenty-two thousand, one hundred one".