222220202121 has 24 divisors (see below), whose sum is σ = 324417165696. Its totient is φ = 146564906400.

The previous prime is 222220202119. The next prime is 222220202153. The reversal of 222220202121 is 121202022222.

222220202121 is a `hidden beast` number, since 222 + 220 + 202 + 1 + 21 = 666.

It is not a de Polignac number, because 222220202121 - 2¹ = 222220202119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222220202094 and 222220202103.

It is not an unprimeable number, because it can be changed into a prime (222220202221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1070976 + ... + 1261518.

It is an arithmetic number, because the mean of its divisors is an integer number (13517381904).

Almost surely, 2^222220202121 is an apocalyptic number.

It is an amenable number.

222220202121 is a deficient number, since it is larger than the sum of its proper divisors (102196963575).

222220202121 is a wasteful number, since it uses less digits than its factorization.

222220202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191933 (or 191930 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 222220202121 its reverse (121202022222), we get a palindrome (343422224343).

The spelling of 222220202121 in words is "two hundred twenty-two billion, two hundred twenty million, two hundred two thousand, one hundred twenty-one".