31001421222 has 32 divisors (see below), whose sum is σ = 68899471200. Its totient is φ = 10332693504.

The previous prime is 31001421179. The next prime is 31001421223. The reversal of 31001421222 is 22212410013.

It is a happy number.

It is a super-2 number, since 2×31001421222² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31001421195 and 31001421204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31001421223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588678 + ... + 639174.

It is an arithmetic number, because the mean of its divisors is an integer number (2153108475).

Almost surely, 2^31001421222 is an apocalyptic number.

31001421222 is an abundant number, since it is smaller than the sum of its proper divisors (37898049978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31001421222 is a wasteful number, since it uses less digits than its factorization.

31001421222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61877 (or 61871 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 31001421222 its reverse (22212410013), we get a palindrome (53213831235).

The spelling of 31001421222 in words is "thirty-one billion, one million, four hundred twenty-one thousand, two hundred twenty-two".