21151504113 has 8 divisors (see below), whose sum is σ = 28249566048. Its totient is φ = 14077222464.

The previous prime is 21151504081. The next prime is 21151504169. The reversal of 21151504113 is 31140515112.

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

It is not a de Polignac number, because 21151504113 - 2⁵ = 21151504081 is a prime.

It is a super-2 number, since 2×21151504113² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21151504613) 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, 5942995 + ... + 5946552.

It is an arithmetic number, because the mean of its divisors is an integer number (3531195756).

Almost surely, 2^21151504113 is an apocalyptic number.

It is an amenable number.

21151504113 is a deficient number, since it is larger than the sum of its proper divisors (7098061935).

21151504113 is a wasteful number, since it uses less digits than its factorization.

21151504113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11890143.

The product of its (nonzero) digits is 600, while the sum is 24.

The spelling of 21151504113 in words is "twenty-one billion, one hundred fifty-one million, five hundred four thousand, one hundred thirteen".