31023022221221 has 8 divisors (see below), whose sum is σ = 31861554873984. Its totient is φ = 30184493389200.

The previous prime is 31023022221151. The next prime is 31023022221281. The reversal of 31023022221221 is 12212222032013.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31023022221221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023022221281) 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, 24670496 + ... + 25897478.

It is an arithmetic number, because the mean of its divisors is an integer number (3982694359248).

Almost surely, 2^{31023022221221} is an apocalyptic number.

It is an amenable number.

31023022221221 is a deficient number, since it is larger than the sum of its proper divisors (838532652763).

31023022221221 is a wasteful number, since it uses less digits than its factorization.

31023022221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910371.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31023022221221 its reverse (12212222032013), we get a palindrome (43235244253234).

The spelling of 31023022221221 in words is "thirty-one trillion, twenty-three billion, twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".