201220300021 has 16 divisors (see below), whose sum is σ = 218426802048. Its totient is φ = 184266331200.

The previous prime is 201220300009. The next prime is 201220300027. The reversal of 201220300021 is 120003022102.

It is a cyclic number.

It is not a de Polignac number, because 201220300021 - 2¹³ = 201220291829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 201220299974 and 201220300010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220300027) 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, 735135 + ... + 971011.

It is an arithmetic number, because the mean of its divisors is an integer number (13651675128).

Almost surely, 2^201220300021 is an apocalyptic number.

It is an amenable number.

201220300021 is a deficient number, since it is larger than the sum of its proper divisors (17206502027).

201220300021 is a wasteful number, since it uses less digits than its factorization.

201220300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236412.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 201220300021 its reverse (120003022102), we get a palindrome (321223322123).

The spelling of 201220300021 in words is "two hundred one billion, two hundred twenty million, three hundred thousand, twenty-one".