222201002022121 has 4 divisors (see below), whose sum is σ = 222389148511044. Its totient is φ = 222012855533200.

The previous prime is 222201002022079. The next prime is 222201002022127. The reversal of 222201002022121 is 121220200102222.

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 103068383107600 + 119132618914521 = 10152260^2 + 10914789^2 .

It is a cyclic number.

It is not a de Polignac number, because 222201002022121 - 2³¹ = 222198854538473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222201002022127) 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, 94073242690 + ... + 94073245051.

It is an arithmetic number, because the mean of its divisors is an integer number (55597287127761).

Almost surely, 2^{222201002022121} is an apocalyptic number.

It is an amenable number.

222201002022121 is a deficient number, since it is larger than the sum of its proper divisors (188146488923).

222201002022121 is a wasteful number, since it uses less digits than its factorization.

222201002022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188146488922.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 222201002022121 its reverse (121220200102222), we get a palindrome (343421202124343).

The spelling of 222201002022121 in words is "two hundred twenty-two trillion, two hundred one billion, two million, twenty-two thousand, one hundred twenty-one".