31211130222228 has 192 divisors, whose sum is σ = 87377468774400. Its totient is φ = 8569941219840.

The previous prime is 31211130222227. The next prime is 31211130222229. The reversal of 31211130222228 is 82222203111213.

It is an interprime number because it is at equal distance from previous prime (31211130222227) and next prime (31211130222229).

It is a junction number, because it is equal to n+sod(n) for n = 31211130222195 and 31211130222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211130222227) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1322043 + ... + 8010621.

It is an arithmetic number, because the mean of its divisors is an integer number (455090983200).

Almost surely, 2^{31211130222228} 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 31211130222228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43688734387200).

31211130222228 is an abundant number, since it is smaller than the sum of its proper divisors (56166338552172).

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

31211130222228 is a wasteful number, since it uses less digits than its factorization.

31211130222228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6688702 (or 6688700 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The spelling of 31211130222228 in words is "thirty-one trillion, two hundred eleven billion, one hundred thirty million, two hundred twenty-two thousand, two hundred twenty-eight".