21031122133130 has 32 divisors (see below), whose sum is σ = 37917431959680. Its totient is φ = 8398812306240.

The previous prime is 21031122133117. The next prime is 21031122133183. The reversal of 21031122133130 is 3133122113012.

It is a super-2 number, since 2×21031122133130² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21031122133096 and 21031122133105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15256757 + ... + 16578023.

It is an arithmetic number, because the mean of its divisors is an integer number (1184919748740).

Almost surely, 2^{21031122133130} is an apocalyptic number.

21031122133130 is a deficient number, since it is larger than the sum of its proper divisors (16886309826550).

21031122133130 is a wasteful number, since it uses less digits than its factorization.

21031122133130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323854.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21031122133130 its reverse (3133122113012), we get a palindrome (24164244246142).

The spelling of 21031122133130 in words is "twenty-one trillion, thirty-one billion, one hundred twenty-two million, one hundred thirty-three thousand, one hundred thirty".