131021012421222 has 256 divisors, whose sum is σ = 337620582604800. Its totient is φ = 33600070358400.

The previous prime is 131021012421217. The next prime is 131021012421239. The reversal of 131021012421222 is 222124210120131.

It is a super-2 number, since 2×131021012421222² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131021012421192 and 131021012421201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 584106733 + ... + 584330999.

It is an arithmetic number, because the mean of its divisors is an integer number (1318830400800).

Almost surely, 2^{131021012421222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131021012421222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168810291302400).

131021012421222 is an abundant number, since it is smaller than the sum of its proper divisors (206599570183578).

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

131021012421222 is a wasteful number, since it uses less digits than its factorization.

131021012421222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224632 (or 224618 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 131021012421222 its reverse (222124210120131), we get a palindrome (353145222541353).

The spelling of 131021012421222 in words is "one hundred thirty-one trillion, twenty-one billion, twelve million, four hundred twenty-one thousand, two hundred twenty-two".