21151156115 has 8 divisors (see below), whose sum is σ = 25384391280. Its totient is φ = 16918922272.

The previous prime is 21151156049. The next prime is 21151156123. The reversal of 21151156115 is 51165115112.

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

It is a cyclic number.

It is not a de Polignac number, because 21151156115 - 2⁸ = 21151155859 is a prime.

It is a super-2 number, since 2×21151156115² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203045 + ... + 289014.

It is an arithmetic number, because the mean of its divisors is an integer number (3173048910).

Almost surely, 2^21151156115 is an apocalyptic number.

21151156115 is a deficient number, since it is larger than the sum of its proper divisors (4233235165).

21151156115 is an equidigital number, since it uses as much as digits as its factorization.

21151156115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500661.

The product of its digits is 1500, while the sum is 29.

The spelling of 21151156115 in words is "twenty-one billion, one hundred fifty-one million, one hundred fifty-six thousand, one hundred fifteen".