221002221012 has 24 divisors (see below), whose sum is σ = 515695639200. Its totient is φ = 73664008416.

The previous prime is 221002221007. The next prime is 221002221043. The reversal of 221002221012 is 210122200122.

It is a junction number, because it is equal to n+sod(n) for n = 221002220982 and 221002221000.

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, 146587 + ... + 680802.

It is an arithmetic number, because the mean of its divisors is an integer number (21487318300).

Almost surely, 2^221002221012 is an apocalyptic number.

It is an amenable number.

221002221012 is an abundant number, since it is smaller than the sum of its proper divisors (294693418188).

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

221002221012 is a wasteful number, since it uses less digits than its factorization.

221002221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849655 (or 849653 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221002221012 its reverse (210122200122), we get a palindrome (431124421134).

The spelling of 221002221012 in words is "two hundred twenty-one billion, two million, two hundred twenty-one thousand, twelve".