1221332331120 has 160 divisors (see below), whose sum is σ = 4172905416960. Its totient is φ = 293028126720.

The previous prime is 1221332331119. The next prime is 1221332331127. The reversal of 1221332331120 is 211332331221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221332331127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2128590 + ... + 2640749.

It is an arithmetic number, because the mean of its divisors is an integer number (26080658856).

Almost surely, 2^{1221332331120} is an apocalyptic number.

1221332331120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221332331120 is an abundant number, since it is smaller than the sum of its proper divisors (2951573085840).

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

1221332331120 is a wasteful number, since it uses less digits than its factorization.

1221332331120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4769463 (or 4769457 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1221332331120 its reverse (211332331221), we get a palindrome (1432664662341).

The spelling of 1221332331120 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-two million, three hundred thirty-one thousand, one hundred twenty".