21121034404130 has 8 divisors (see below), whose sum is σ = 38017861927452. Its totient is φ = 8448413761648.

The previous prime is 21121034404097. The next prime is 21121034404147. The reversal of 21121034404130 is 3140443012112.

It can be written as a sum of positive squares in 2 ways, for example, as 20370716372449 + 750318031681 = 4513393^2 + 866209^2 .

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

It is a super-2 number, since 2×21121034404130² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21121034404130.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056051720197 + ... + 1056051720216.

Almost surely, 2^{21121034404130} is an apocalyptic number.

21121034404130 is a deficient number, since it is larger than the sum of its proper divisors (16896827523322).

21121034404130 is a wasteful number, since it uses less digits than its factorization.

21121034404130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112103440420.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21121034404130 its reverse (3140443012112), we get a palindrome (24261477416242).

The spelling of 21121034404130 in words is "twenty-one trillion, one hundred twenty-one billion, thirty-four million, four hundred four thousand, one hundred thirty".