202221222122121 has 16 divisors (see below), whose sum is σ = 276916015857600. Its totient is φ = 131170300561728.

The previous prime is 202221222122053. The next prime is 202221222122159. The reversal of 202221222122121 is 121221222122202.

It is a happy number.

202221222122121 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 202221222122121 - 2⁹ = 202221222121609 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202221222122091 and 202221222122100.

It is not an unprimeable number, because it can be changed into a prime (202221222123121) 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, 87381310 + ... + 89665688.

It is an arithmetic number, because the mean of its divisors is an integer number (17307250991100).

Almost surely, 2^{202221222122121} is an apocalyptic number.

It is an amenable number.

202221222122121 is a deficient number, since it is larger than the sum of its proper divisors (74694793735479).

202221222122121 is a wasteful number, since it uses less digits than its factorization.

202221222122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3081928.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 202221222122121 its reverse (121221222122202), we get a palindrome (323442444244323).

The spelling of 202221222122121 in words is "two hundred two trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty-one".