20102021020121 has 16 divisors (see below), whose sum is σ = 21331277527680. Its totient is φ = 18877980145920.

The previous prime is 20102021020073. The next prime is 20102021020201. The reversal of 20102021020121 is 12102012020102.

It is a cyclic number.

It is not a de Polignac number, because 20102021020121 - 2¹⁸ = 20102020757977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20102021020096 and 20102021020105.

It is not an unprimeable number, because it can be changed into a prime (20102021020021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37173086 + ... + 37709976.

It is an arithmetic number, because the mean of its divisors is an integer number (1333204845480).

Almost surely, 2^{20102021020121} is an apocalyptic number.

It is an amenable number.

20102021020121 is a deficient number, since it is larger than the sum of its proper divisors (1229256507559).

20102021020121 is a wasteful number, since it uses less digits than its factorization.

20102021020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541744.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20102021020121 its reverse (12102012020102), we get a palindrome (32204033040223).

The spelling of 20102021020121 in words is "twenty trillion, one hundred two billion, twenty-one million, twenty thousand, one hundred twenty-one".