21014512051 has 8 divisors (see below), whose sum is σ = 23614970400. Its totient is φ = 18554619072.

The previous prime is 21014512033. The next prime is 21014512091. The reversal of 21014512051 is 15021541012.

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 21014512051 - 2⁷ = 21014511923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21014512021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35141026 + ... + 35141623.

It is an arithmetic number, because the mean of its divisors is an integer number (2951871300).

Almost surely, 2^21014512051 is an apocalyptic number.

21014512051 is a deficient number, since it is larger than the sum of its proper divisors (2600458349).

21014512051 is a wasteful number, since it uses less digits than its factorization.

21014512051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70282685.

The product of its (nonzero) digits is 400, while the sum is 22.

The spelling of 21014512051 in words is "twenty-one billion, fourteen million, five hundred twelve thousand, fifty-one".