222131011110021 has 24 divisors (see below), whose sum is σ = 345545306169336. Its totient is φ = 136692771672960.

The previous prime is 222131011109963. The next prime is 222131011110037. The reversal of 222131011110021 is 120011110131222.

It is a happy number.

222131011110021 is a `hidden beast` number, since 2 + 221 + 310 + 1 + 1 + 110 + 0 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4028651122500 + 218102359987521 = 2007150^2 + 14768289^2 .

It is not a de Polignac number, because 222131011110021 - 2¹⁴ = 222131011093637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222131011109976 and 222131011110003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222131011110061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17496990 + ... + 27393551.

It is an arithmetic number, because the mean of its divisors is an integer number (14397721090389).

Almost surely, 2^{222131011110021} is an apocalyptic number.

It is an amenable number.

222131011110021 is a deficient number, since it is larger than the sum of its proper divisors (123414295059315).

222131011110021 is a wasteful number, since it uses less digits than its factorization.

222131011110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44932853 (or 44932850 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 222131011110021 its reverse (120011110131222), we get a palindrome (342142121241243).

The spelling of 222131011110021 in words is "two hundred twenty-two trillion, one hundred thirty-one billion, eleven million, one hundred ten thousand, twenty-one".