31112202223121 has 8 divisors (see below), whose sum is σ = 31148805680160. Its totient is φ = 31075619825952.

The previous prime is 31112202223087. The next prime is 31112202223181. The reversal of 31112202223121 is 12132220221113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31112202223121 - 2²² = 31112198028817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31112202223181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2307611 + ... + 8218848.

It is an arithmetic number, because the mean of its divisors is an integer number (3893600710020).

Almost surely, 2^{31112202223121} is an apocalyptic number.

It is an amenable number.

31112202223121 is a deficient number, since it is larger than the sum of its proper divisors (36603457039).

31112202223121 is a wasteful number, since it uses less digits than its factorization.

31112202223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10529935.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 31112202223121 its reverse (12132220221113), we get a palindrome (43244422444234).

The spelling of 31112202223121 in words is "thirty-one trillion, one hundred twelve billion, two hundred two million, two hundred twenty-three thousand, one hundred twenty-one".