221130111331212 has 48 divisors (see below), whose sum is σ = 517325930483712. Its totient is φ = 73516376185920.

The previous prime is 221130111331163. The next prime is 221130111331247. The reversal of 221130111331212 is 212133111031122.

It is a super-2 number, since 2×221130111331212² (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 15 ways as a sum of consecutive naturals, for example, 305460903 + ... + 306183969.

It is an arithmetic number, because the mean of its divisors is an integer number (10777623551744).

Almost surely, 2^{221130111331212} is an apocalyptic number.

It is an amenable number.

221130111331212 is an abundant number, since it is smaller than the sum of its proper divisors (296195819152500).

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

221130111331212 is a wasteful number, since it uses less digits than its factorization.

221130111331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789998 (or 789996 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 221130111331212 its reverse (212133111031122), we get a palindrome (433263222362334).

The spelling of 221130111331212 in words is "two hundred twenty-one trillion, one hundred thirty billion, one hundred eleven million, three hundred thirty-one thousand, two hundred twelve".