202012121 has 8 divisors (see below), whose sum is σ = 203798400. Its totient is φ = 200234160.

The previous prime is 202012093. The next prime is 202012127. The reversal of 202012121 is 121210202.

It is a happy number.

202012121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202012121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202012127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52886 + ... + 56576.

It is an arithmetic number, because the mean of its divisors is an integer number (25474800).

Almost surely, 2^202012121 is an apocalyptic number.

It is an amenable number.

202012121 is a deficient number, since it is larger than the sum of its proper divisors (1786279).

202012121 is a wasteful number, since it uses less digits than its factorization.

202012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 202012121 is about 14213.0968124473. The cubic root of 202012121 is about 586.7581665064.

Adding to 202012121 its reverse (121210202), we get a palindrome (323222323).

It can be divided in two parts, 20201 and 2121, that added together give a palindrome (22322).

The spelling of 202012121 in words is "two hundred two million, twelve thousand, one hundred twenty-one".