21020131210101 has 16 divisors (see below), whose sum is σ = 28305117012480. Its totient is φ = 13874770456560.

The previous prime is 21020131210093. The next prime is 21020131210123. The reversal of 21020131210101 is 10101213102012.

It is not a de Polignac number, because 21020131210101 - 2³ = 21020131210093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020131217101) 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, 60745855 + ... + 61090908.

It is an arithmetic number, because the mean of its divisors is an integer number (1769069813280).

Almost surely, 2^{21020131210101} is an apocalyptic number.

It is an amenable number.

21020131210101 is a deficient number, since it is larger than the sum of its proper divisors (7284985802379).

21020131210101 is a wasteful number, since it uses less digits than its factorization.

21020131210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121837336.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21020131210101 its reverse (10101213102012), we get a palindrome (31121344312113).

The spelling of 21020131210101 in words is "twenty-one trillion, twenty billion, one hundred thirty-one million, two hundred ten thousand, one hundred one".