221021000120012 has 6 divisors (see below), whose sum is σ = 386786750210028. Its totient is φ = 110510500060004.

The previous prime is 221021000119981. The next prime is 221021000120087. The reversal of 221021000120012 is 210021000120122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27627625014998 + ... + 27627625015005.

It is an arithmetic number, because the mean of its divisors is an integer number (64464458368338).

Almost surely, 2^{221021000120012} is an apocalyptic number.

It is an amenable number.

221021000120012 is a deficient number, since it is larger than the sum of its proper divisors (165765750090016).

221021000120012 is a wasteful number, since it uses less digits than its factorization.

221021000120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55255250030007 (or 55255250030005 counting only the distinct ones).

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

Adding to 221021000120012 its reverse (210021000120122), we get a palindrome (431042000240134).

The spelling of 221021000120012 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred twenty thousand, twelve".