202001220121 has 16 divisors (see below), whose sum is σ = 222737015808. Its totient is φ = 182357683200.

The previous prime is 202001220119. The next prime is 202001220137. The reversal of 202001220121 is 121022100202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 202001220121 - 2¹ = 202001220119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202001220151) 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, 1636485 + ... + 1755586.

It is an arithmetic number, because the mean of its divisors is an integer number (13921063488).

Almost surely, 2^202001220121 is an apocalyptic number.

It is an amenable number.

202001220121 is a deficient number, since it is larger than the sum of its proper divisors (20735795687).

202001220121 is a wasteful number, since it uses less digits than its factorization.

202001220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392232.

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

Adding to 202001220121 its reverse (121022100202), we get a palindrome (323023320323).

The spelling of 202001220121 in words is "two hundred two billion, one million, two hundred twenty thousand, one hundred twenty-one".