31222201000 has 128 divisors (see below), whose sum is σ = 77378146560. Its totient is φ = 11767008000.

The previous prime is 31222200967. The next prime is 31222201013. The reversal of 31222201000 is 10222213.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1530870 + ... + 1551130.

It is an arithmetic number, because the mean of its divisors is an integer number (604516770).

Almost surely, 2^31222201000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31222201000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38689073280).

31222201000 is an abundant number, since it is smaller than the sum of its proper divisors (46155945560).

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

31222201000 is a wasteful number, since it uses less digits than its factorization.

31222201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20372 (or 20358 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 31222201000 its reverse (10222213), we get a palindrome (31232423213).

The spelling of 31222201000 in words is "thirty-one billion, two hundred twenty-two million, two hundred one thousand".