221010012212 has 24 divisors (see below), whose sum is σ = 422364613440. Its totient is φ = 100355189760.

The previous prime is 221010012211. The next prime is 221010012239. The reversal of 221010012212 is 212210010122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010012211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2554637 + ... + 2639732.

It is an arithmetic number, because the mean of its divisors is an integer number (17598525560).

Almost surely, 2^221010012212 is an apocalyptic number.

221010012212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221010012212 is a deficient number, since it is larger than the sum of its proper divisors (201354601228).

221010012212 is a wasteful number, since it uses less digits than its factorization.

221010012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5195351 (or 5195349 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221010012212 its reverse (212210010122), we get a palindrome (433220022334).

The spelling of 221010012212 in words is "two hundred twenty-one billion, ten million, twelve thousand, two hundred twelve".