202121001220201 has 12 divisors (see below), whose sum is σ = 235278253311060. Its totient is φ = 173130221456640.

The previous prime is 202121001220139. The next prime is 202121001220207. The reversal of 202121001220201 is 102022100121202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 141748645118976 + 60372356101225 = 11905824^2 + 7769965^2 .

It is not a de Polignac number, because 202121001220201 - 2¹⁵ = 202121001187433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202121001220207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1385057460 + ... + 1385203381.

It is an arithmetic number, because the mean of its divisors is an integer number (19606521109255).

Almost surely, 2^{202121001220201} is an apocalyptic number.

It is an amenable number.

202121001220201 is a deficient number, since it is larger than the sum of its proper divisors (33157252090859).

202121001220201 is a wasteful number, since it uses less digits than its factorization.

202121001220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770262344 (or 2770262337 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202121001220201 its reverse (102022100121202), we get a palindrome (304143101341403).

The spelling of 202121001220201 in words is "two hundred two trillion, one hundred twenty-one billion, one million, two hundred twenty thousand, two hundred one".