1213122331020 has 96 divisors (see below), whose sum is σ = 3508158044160. Its totient is φ = 312899258880.

The previous prime is 1213122330991. The next prime is 1213122331037. The reversal of 1213122331020 is 201332213121.

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, 3387711 + ... + 3728649.

It is an arithmetic number, because the mean of its divisors is an integer number (36543312960).

Almost surely, 2^{1213122331020} is an apocalyptic number.

1213122331020 is a gapful number since it is divisible by the number (10) 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 1213122331020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1754079022080).

1213122331020 is an abundant number, since it is smaller than the sum of its proper divisors (2295035713140).

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

1213122331020 is a wasteful number, since it uses less digits than its factorization.

1213122331020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342895 (or 342893 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1213122331020 its reverse (201332213121), we get a palindrome (1414454544141).

The spelling of 1213122331020 in words is "one trillion, two hundred thirteen billion, one hundred twenty-two million, three hundred thirty-one thousand, twenty".