2312231221000 has 32 divisors (see below), whose sum is σ = 5410621059480. Its totient is φ = 924892488000.

The previous prime is 2312231220983. The next prime is 2312231221009. The reversal of 2312231221000 is 1221322132.

It can be written as a sum of positive squares in 4 ways, for example, as 1121264974404 + 1190966246596 = 1058898^2 + 1091314^2 .

It is not an unprimeable number, because it can be changed into a prime (2312231221009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1156114611 + ... + 1156116610.

Almost surely, 2^{2312231221000} is an apocalyptic number.

2312231221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2312231221000 is an abundant number, since it is smaller than the sum of its proper divisors (3098389838480).

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

2312231221000 is a wasteful number, since it uses less digits than its factorization.

2312231221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312231242 (or 2312231228 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 2312231221000 its reverse (1221322132), we get a palindrome (2313452543132).

The spelling of 2312231221000 in words is "two trillion, three hundred twelve billion, two hundred thirty-one million, two hundred twenty-one thousand".