21012514242 has 8 divisors (see below), whose sum is σ = 42025028496. Its totient is φ = 7004171412.

The previous prime is 21012514217. The next prime is 21012514277. The reversal of 21012514242 is 24241521012.

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

21012514242 is an admirable number.

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, 1751042848 + ... + 1751042859.

It is an arithmetic number, because the mean of its divisors is an integer number (5253128562).

Almost surely, 2^21012514242 is an apocalyptic number.

21012514242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012514242 is a wasteful number, since it uses less digits than its factorization.

21012514242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502085712.

The product of its (nonzero) digits is 1280, while the sum is 24.

The spelling of 21012514242 in words is "twenty-one billion, twelve million, five hundred fourteen thousand, two hundred forty-two".