221020120012 has 6 divisors (see below), whose sum is σ = 386785210028. Its totient is φ = 110510060004.

The previous prime is 221020120001. The next prime is 221020120031. The reversal of 221020120012 is 210021020122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221020119974 and 221020120001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27627514998 + ... + 27627515005.

Almost surely, 2^221020120012 is an apocalyptic number.

It is an amenable number.

221020120012 is a deficient number, since it is larger than the sum of its proper divisors (165765090016).

221020120012 is a wasteful number, since it uses less digits than its factorization.

221020120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55255030007 (or 55255030005 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221020120012 its reverse (210021020122), we get a palindrome (431041140134).

The spelling of 221020120012 in words is "two hundred twenty-one billion, twenty million, one hundred twenty thousand, twelve".