31222201021 has 8 divisors (see below), whose sum is σ = 34618953888. Its totient is φ = 27918510000.

The previous prime is 31222201013. The next prime is 31222201061. The reversal of 31222201021 is 12010222213.

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 not a de Polignac number, because 31222201021 - 2³ = 31222201013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31222200986 and 31222201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222201061) 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 7 ways as a sum of consecutive naturals, for example, 23264755 + ... + 23266096.

It is an arithmetic number, because the mean of its divisors is an integer number (4327369236).

Almost surely, 2^31222201021 is an apocalyptic number.

It is an amenable number.

31222201021 is a deficient number, since it is larger than the sum of its proper divisors (3396752867).

31222201021 is a wasteful number, since it uses less digits than its factorization.

31222201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46530923.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31222201021 its reverse (12010222213), we get a palindrome (43232423234).

The spelling of 31222201021 in words is "thirty-one billion, two hundred twenty-two million, two hundred one thousand, twenty-one".