221012001012 has 24 divisors (see below), whose sum is σ = 562576002912. Its totient is φ = 66973333600.

The previous prime is 221012000939. The next prime is 221012001037. The reversal of 221012001012 is 210100210122.

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

It is a congruent number.

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, 837166539 + ... + 837166802.

It is an arithmetic number, because the mean of its divisors is an integer number (23440666788).

Almost surely, 2^221012001012 is an apocalyptic number.

221012001012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221012001012 is an abundant number, since it is smaller than the sum of its proper divisors (341564001900).

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

221012001012 is a wasteful number, since it uses less digits than its factorization.

221012001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674333359 (or 1674333357 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221012001012 its reverse (210100210122), we get a palindrome (431112211134).

The spelling of 221012001012 in words is "two hundred twenty-one billion, twelve million, one thousand, twelve".