1221022010120 has 64 divisors (see below), whose sum is σ = 3008449952640. Its totient is φ = 442319718400.

The previous prime is 1221022010111. The next prime is 1221022010141. The reversal of 1221022010120 is 210102201221.

It is a junction number, because it is equal to n+sod(n) for n = 1221022010095 and 1221022010104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5160041 + ... + 5391480.

It is an arithmetic number, because the mean of its divisors is an integer number (47007030510).

Almost surely, 2^{1221022010120} is an apocalyptic number.

1221022010120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221022010120 is an abundant number, since it is smaller than the sum of its proper divisors (1787427942520).

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

1221022010120 is a wasteful number, since it uses less digits than its factorization.

1221022010120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10551806 (or 10551802 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221022010120 its reverse (210102201221), we get a palindrome (1431124211341).

The spelling of 1221022010120 in words is "one trillion, two hundred twenty-one billion, twenty-two million, ten thousand, one hundred twenty".