222121020131 has 4 divisors (see below), whose sum is σ = 222133944600. Its totient is φ = 222108095664.

The previous prime is 222121020073. The next prime is 222121020161. The reversal of 222121020131 is 131020121222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222121020131 is a prime.

It is a super-2 number, since 2×222121020131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121020161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6436421 + ... + 6470838.

It is an arithmetic number, because the mean of its divisors is an integer number (55533486150).

Almost surely, 2^222121020131 is an apocalyptic number.

222121020131 is a deficient number, since it is larger than the sum of its proper divisors (12924469).

222121020131 is a wasteful number, since it uses less digits than its factorization.

222121020131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12924468.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 222121020131 its reverse (131020121222), we get a palindrome (353141141353).

The spelling of 222121020131 in words is "two hundred twenty-two billion, one hundred twenty-one million, twenty thousand, one hundred thirty-one".