1231330221110 has 64 divisors (see below), whose sum is σ = 2525696308224. Its totient is φ = 427832803200.

The previous prime is 1231330221089. The next prime is 1231330221151. The reversal of 1231330221110 is 111220331321.

It is a happy number.

It is a super-2 number, since 2×1231330221110² (a number of 25 digits) contains 22 as substring.

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, 2122127 + ... + 2639333.

It is an arithmetic number, because the mean of its divisors is an integer number (39464004816).

Almost surely, 2^{1231330221110} is an apocalyptic number.

1231330221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231330221110 is an abundant number, since it is smaller than the sum of its proper divisors (1294366087114).

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

1231330221110 is a wasteful number, since it uses less digits than its factorization.

1231330221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518189.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1231330221110 its reverse (111220331321), we get a palindrome (1342550552431).

The spelling of 1231330221110 in words is "one trillion, two hundred thirty-one billion, three hundred thirty million, two hundred twenty-one thousand, one hundred ten".