221525701111012 has 24 divisors (see below), whose sum is σ = 396123095604096. Its totient is φ = 108350112144288.

The previous prime is 221525701110983. The next prime is 221525701111021. The reversal of 221525701111012 is 210111107525122.

It is a super-2 number, since 2×221525701111012² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304429198 + ... + 305156005.

It is an arithmetic number, because the mean of its divisors is an integer number (16505128983504).

Almost surely, 2^{221525701111012} is an apocalyptic number.

It is an amenable number.

221525701111012 is a deficient number, since it is larger than the sum of its proper divisors (174597394493084).

221525701111012 is a wasteful number, since it uses less digits than its factorization.

221525701111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609587187 (or 609587185 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 31.

Adding to 221525701111012 its reverse (210111107525122), we get a palindrome (431636808636134).

The spelling of 221525701111012 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, seven hundred one million, one hundred eleven thousand, twelve".