1221021230120 has 32 divisors (see below), whose sum is σ = 2748599377920. Its totient is φ = 488177094720.

The previous prime is 1221021230027. The next prime is 1221021230129. The reversal of 1221021230120 is 210321201221.

It is not an unprimeable number, because it can be changed into a prime (1221021230129) 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, 7145672 + ... + 7314551.

It is an arithmetic number, because the mean of its divisors is an integer number (85893730560).

Almost surely, 2^{1221021230120} is an apocalyptic number.

1221021230120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221021230120 is an abundant number, since it is smaller than the sum of its proper divisors (1527578147800).

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

1221021230120 is a wasteful number, since it uses less digits than its factorization.

1221021230120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14462345 (or 14462341 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1221021230120 its reverse (210321201221), we get a palindrome (1431342431341).

The spelling of 1221021230120 in words is "one trillion, two hundred twenty-one billion, twenty-one million, two hundred thirty thousand, one hundred twenty".