21221120201012 has 12 divisors (see below), whose sum is σ = 38751610802016. Its totient is φ = 10149231400440.

The previous prime is 21221120200961. The next prime is 21221120201087. The reversal of 21221120201012 is 21010202112212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115332174914 + ... + 115332175097.

It is an arithmetic number, because the mean of its divisors is an integer number (3229300900168).

Almost surely, 2^{21221120201012} is an apocalyptic number.

It is an amenable number.

21221120201012 is a deficient number, since it is larger than the sum of its proper divisors (17530490601004).

21221120201012 is a wasteful number, since it uses less digits than its factorization.

21221120201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230664350038 (or 230664350036 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221120201012 its reverse (21010202112212), we get a palindrome (42231322313224).

The spelling of 21221120201012 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty million, two hundred one thousand, twelve".