21911291130021 has 8 divisors (see below), whose sum is σ = 29220458052864. Its totient is φ = 14604825813600.

The previous prime is 21911291130019. The next prime is 21911291130073. The reversal of 21911291130021 is 12003119211912.

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

It is not a de Polignac number, because 21911291130021 - 2¹ = 21911291130019 is a prime.

It is a super-2 number, since 2×21911291130021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21911291180021) 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, 675382680 + ... + 675415121.

It is an arithmetic number, because the mean of its divisors is an integer number (3652557256608).

Almost surely, 2^{21911291130021} is an apocalyptic number.

It is an amenable number.

21911291130021 is a deficient number, since it is larger than the sum of its proper divisors (7309166922843).

21911291130021 is a wasteful number, since it uses less digits than its factorization.

21911291130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350803211.

The product of its (nonzero) digits is 1944, while the sum is 33.

The spelling of 21911291130021 in words is "twenty-one trillion, nine hundred eleven billion, two hundred ninety-one million, one hundred thirty thousand, twenty-one".