21310121203011 has 24 divisors (see below), whose sum is σ = 31613964471024. Its totient is φ = 13822452671040.

The previous prime is 21310121202977. The next prime is 21310121203039. The reversal of 21310121203011 is 11030212101312.

21310121203011 is a `hidden beast` number, since 21 + 310 + 12 + 1 + 20 + 301 + 1 = 666.

It is not a de Polignac number, because 21310121203011 - 2⁹ = 21310121202499 is a prime.

It is a super-2 number, since 2×21310121203011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21310121204011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13676785 + ... + 15155021.

It is an arithmetic number, because the mean of its divisors is an integer number (1317248519626).

Almost surely, 2^{21310121203011} is an apocalyptic number.

21310121203011 is a deficient number, since it is larger than the sum of its proper divisors (10303843268013).

21310121203011 is a wasteful number, since it uses less digits than its factorization.

21310121203011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521571 (or 1521568 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21310121203011 its reverse (11030212101312), we get a palindrome (32340333304323).

The spelling of 21310121203011 in words is "twenty-one trillion, three hundred ten billion, one hundred twenty-one million, two hundred three thousand, eleven".