201201202020021 has 32 divisors (see below), whose sum is σ = 318177761660160. Its totient is φ = 110652902889984.

The previous prime is 201201202019977. The next prime is 201201202020023. The reversal of 201201202020021 is 120020202102102.

It is not a de Polignac number, because 201201202020021 - 2⁶ = 201201202019957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201202020023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 527572390 + ... + 527953623.

It is an arithmetic number, because the mean of its divisors is an integer number (9943055051880).

Almost surely, 2^{201201202020021} is an apocalyptic number.

201201202020021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201201202020021 is a deficient number, since it is larger than the sum of its proper divisors (116976559640139).

201201202020021 is a wasteful number, since it uses less digits than its factorization.

201201202020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055526365.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 201201202020021 its reverse (120020202102102), we get a palindrome (321221404122123).

The spelling of 201201202020021 in words is "two hundred one trillion, two hundred one billion, two hundred two million, twenty thousand, twenty-one".