221025264612 has 48 divisors (see below), whose sum is σ = 518116032000. Its totient is φ = 73333774080.

The previous prime is 221025264587. The next prime is 221025264641. The reversal of 221025264612 is 216462520122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13267264 + ... + 13283912.

It is an arithmetic number, because the mean of its divisors is an integer number (10794084000).

Almost surely, 2^221025264612 is an apocalyptic number.

It is an amenable number.

221025264612 is an abundant number, since it is smaller than the sum of its proper divisors (297090767388).

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

221025264612 is a wasteful number, since it uses less digits than its factorization.

221025264612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21716 (or 21714 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

Adding to 221025264612 its reverse (216462520122), we get a palindrome (437487784734).

The spelling of 221025264612 in words is "two hundred twenty-one billion, twenty-five million, two hundred sixty-four thousand, six hundred twelve".