21512200722 has 8 divisors (see below), whose sum is σ = 43024401456. Its totient is φ = 7170733572.

The previous prime is 21512200669. The next prime is 21512200727. The reversal of 21512200722 is 22700221512.

21512200722 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

21512200722 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21512200692 and 21512200701.

It is not an unprimeable number, because it can be changed into a prime (21512200727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792683388 + ... + 1792683399.

It is an arithmetic number, because the mean of its divisors is an integer number (5378050182).

Almost surely, 2^21512200722 is an apocalyptic number.

21512200722 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.

21512200722 is a wasteful number, since it uses less digits than its factorization.

21512200722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585366792.

The product of its (nonzero) digits is 1120, while the sum is 24.

The spelling of 21512200722 in words is "twenty-one billion, five hundred twelve million, two hundred thousand, seven hundred twenty-two".