201202120021 has 16 divisors (see below), whose sum is σ = 237113710848. Its totient is φ = 167138352000.

The previous prime is 201202120013. The next prime is 201202120033. The reversal of 201202120021 is 120021202102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201202120021 - 2³ = 201202120013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201202119983 and 201202120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201202120061) 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, 2278030 + ... + 2364703.

It is an arithmetic number, because the mean of its divisors is an integer number (14819606928).

Almost surely, 2^201202120021 is an apocalyptic number.

It is an amenable number.

201202120021 is a deficient number, since it is larger than the sum of its proper divisors (35911590827).

201202120021 is a wasteful number, since it uses less digits than its factorization.

201202120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4642932.

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

Adding to 201202120021 its reverse (120021202102), we get a palindrome (321223322123).

The spelling of 201202120021 in words is "two hundred one billion, two hundred two million, one hundred twenty thousand, twenty-one".