201200121010021 has 32 divisors (see below), whose sum is σ = 245277510133760. Its totient is φ = 161210232369216.

The previous prime is 201200121009997. The next prime is 201200121010093. The reversal of 201200121010021 is 120010121002102.

It is not a de Polignac number, because 201200121010021 - 2⁷ = 201200121009893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201200121009983 and 201200121010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201200121010921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22716591 + ... + 30305836.

It is an arithmetic number, because the mean of its divisors is an integer number (7664922191680).

Almost surely, 2^{201200121010021} is an apocalyptic number.

It is an amenable number.

201200121010021 is a deficient number, since it is larger than the sum of its proper divisors (44077389123739).

201200121010021 is a wasteful number, since it uses less digits than its factorization.

201200121010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53022833.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201200121010021 its reverse (120010121002102), we get a palindrome (321210242012123).

The spelling of 201200121010021 in words is "two hundred one trillion, two hundred billion, one hundred twenty-one million, ten thousand, twenty-one".