20211110102121 has 32 divisors (see below), whose sum is σ = 27105446817792. Its totient is φ = 13395598032960.

The previous prime is 20211110102077. The next prime is 20211110102143. The reversal of 20211110102121 is 12120101111202.

It is a happy number.

It is not a de Polignac number, because 20211110102121 - 2³⁸ = 19936232195177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20211110102121.

It is not an unprimeable number, because it can be changed into a prime (20211110102021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2149427406 + ... + 2149436808.

It is an arithmetic number, because the mean of its divisors is an integer number (847045213056).

Almost surely, 2^{20211110102121} is an apocalyptic number.

It is an amenable number.

20211110102121 is a deficient number, since it is larger than the sum of its proper divisors (6894336715671).

20211110102121 is a wasteful number, since it uses less digits than its factorization.

20211110102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13613.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20211110102121 its reverse (12120101111202), we get a palindrome (32331211213323).

The spelling of 20211110102121 in words is "twenty trillion, two hundred eleven billion, one hundred ten million, one hundred two thousand, one hundred twenty-one".