21012322510 has 8 divisors (see below), whose sum is σ = 37822180536. Its totient is φ = 8404929000.

The previous prime is 21012322469. The next prime is 21012322517. The reversal of 21012322510 is 1522321012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012322517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050616116 + ... + 1050616135.

It is an arithmetic number, because the mean of its divisors is an integer number (4727772567).

Almost surely, 2^21012322510 is an apocalyptic number.

21012322510 is a deficient number, since it is larger than the sum of its proper divisors (16809858026).

21012322510 is a wasteful number, since it uses less digits than its factorization.

21012322510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101232258.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 21012322510 its reverse (1522321012), we get a palindrome (22534643522).

The spelling of 21012322510 in words is "twenty-one billion, twelve million, three hundred twenty-two thousand, five hundred ten".