221000022012 has 48 divisors (see below), whose sum is σ = 642909157632. Its totient is φ = 57402602880.

The previous prime is 221000021993. The next prime is 221000022017. The reversal of 221000022012 is 210220000122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000022017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119587833 + ... + 119589680.

It is an arithmetic number, because the mean of its divisors is an integer number (13393940784).

Almost surely, 2^221000022012 is an apocalyptic number.

221000022012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221000022012 is an abundant number, since it is smaller than the sum of its proper divisors (421909135620).

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

221000022012 is a wasteful number, since it uses less digits than its factorization.

221000022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239177538 (or 239177536 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 221000022012 its reverse (210220000122), we get a palindrome (431220022134).

The spelling of 221000022012 in words is "two hundred twenty-one billion, twenty-two thousand, twelve".