21212960522 has 8 divisors (see below), whose sum is σ = 34267090116. Its totient is φ = 9790597152.

The previous prime is 21212960507. The next prime is 21212960539. The reversal of 21212960522 is 22506921212.

It can be written as a sum of positive squares in 2 ways, for example, as 21082749601 + 130210921 = 145199^2 + 11411^2 .

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

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, 407941523 + ... + 407941574.

Almost surely, 2^21212960522 is an apocalyptic number.

21212960522 is a deficient number, since it is larger than the sum of its proper divisors (13054129594).

21212960522 is a wasteful number, since it uses less digits than its factorization.

21212960522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815883112.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 21212960522 in words is "twenty-one billion, two hundred twelve million, nine hundred sixty thousand, five hundred twenty-two".