202001210121 has 16 divisors (see below), whose sum is σ = 270268040000. Its totient is φ = 134201389248.

The previous prime is 202001210119. The next prime is 202001210143. The reversal of 202001210121 is 121012100202.

It is not a de Polignac number, because 202001210121 - 2¹ = 202001210119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202001210097 and 202001210106.

It is not an unprimeable number, because it can be changed into a prime (202001210171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1722075 + ... + 1835631.

It is an arithmetic number, because the mean of its divisors is an integer number (16891752500).

Almost surely, 2^202001210121 is an apocalyptic number.

It is an amenable number.

202001210121 is a deficient number, since it is larger than the sum of its proper divisors (68266829879).

202001210121 is a wasteful number, since it uses less digits than its factorization.

202001210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115608.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 202001210121 its reverse (121012100202), we get a palindrome (323013310323).

It can be divided in two parts, 20200 and 1210121, that added together give a palindrome (1230321).

The spelling of 202001210121 in words is "two hundred two billion, one million, two hundred ten thousand, one hundred twenty-one".