115021321212 has 96 divisors (see below), whose sum is σ = 324009011200. Its totient is φ = 31023456192.

The previous prime is 115021321199. The next prime is 115021321229. The reversal of 115021321212 is 212123120511.

It is a super-2 number, since 2×115021321212² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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, 324339 + ... + 578997.

Almost surely, 2^115021321212 is an apocalyptic number.

115021321212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115021321212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162004505600).

115021321212 is an abundant number, since it is smaller than the sum of its proper divisors (208987689988).

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

115021321212 is a wasteful number, since it uses less digits than its factorization.

115021321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254975 (or 254973 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 115021321212 its reverse (212123120511), we get a palindrome (327144441723).

The spelling of 115021321212 in words is "one hundred fifteen billion, twenty-one million, three hundred twenty-one thousand, two hundred twelve".