201221212202012 has 24 divisors (see below), whose sum is σ = 373790241178704. Its totient is φ = 94453815405312.

The previous prime is 201221212201993. The next prime is 201221212202051. The reversal of 201221212202012 is 210202212122102.

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, 3726843878 + ... + 3726897869.

It is an arithmetic number, because the mean of its divisors is an integer number (15574593382446).

Almost surely, 2^{201221212202012} is an apocalyptic number.

It is an amenable number.

201221212202012 is a deficient number, since it is larger than the sum of its proper divisors (172569028976692).

201221212202012 is a wasteful number, since it uses less digits than its factorization.

201221212202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7453742165 (or 7453742163 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 201221212202012 its reverse (210202212122102), we get a palindrome (411423424324114).

The spelling of 201221212202012 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred twelve million, two hundred two thousand, twelve".