21021010211131 has 8 divisors (see below), whose sum is σ = 24026989056480. Its totient is φ = 18015775712448.

The previous prime is 21021010211093. The next prime is 21021010211143. The reversal of 21021010211131 is 13111201012012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21021010211131 - 2²¹ = 21021008113979 is a prime.

It is a super-2 number, since 2×21021010211131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021010215131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186026146 + ... + 186139111.

It is an arithmetic number, because the mean of its divisors is an integer number (3003373632060).

Almost surely, 2^{21021010211131} is an apocalyptic number.

21021010211131 is a deficient number, since it is larger than the sum of its proper divisors (3005978845349).

21021010211131 is an equidigital number, since it uses as much as digits as its factorization.

21021010211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372173333.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21021010211131 its reverse (13111201012012), we get a palindrome (34132211223143).

The spelling of 21021010211131 in words is "twenty-one trillion, twenty-one billion, ten million, two hundred eleven thousand, one hundred thirty-one".