102201220022021 has 4 divisors (see below), whose sum is σ = 102262455026700. Its totient is φ = 102139985017344.

The previous prime is 102201220022003. The next prime is 102201220022029. The reversal of 102201220022021 is 120220022102201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86695652102500 + 15505567919521 = 9311050^2 + 3937711^2 .

It is a cyclic number.

It is not a de Polignac number, because 102201220022021 - 2¹⁰ = 102201220020997 is a prime.

It is a super-2 number, since 2×102201220022021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102201220022029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30617499836 + ... + 30617503173.

It is an arithmetic number, because the mean of its divisors is an integer number (25565613756675).

Almost surely, 2^{102201220022021} is an apocalyptic number.

It is an amenable number.

102201220022021 is a deficient number, since it is larger than the sum of its proper divisors (61235004679).

102201220022021 is an equidigital number, since it uses as much as digits as its factorization.

102201220022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61235004678.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 102201220022021 its reverse (120220022102201), we get a palindrome (222421242124222).

The spelling of 102201220022021 in words is "one hundred two trillion, two hundred one billion, two hundred twenty million, twenty-two thousand, twenty-one".