1221102030512 has 160 divisors (see below), whose sum is σ = 2950724474880. Its totient is φ = 476633963520.

The previous prime is 1221102030481. The next prime is 1221102030521. The reversal of 1221102030512 is 2150302011221.

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, 236141687 + ... + 236146857.

It is an arithmetic number, because the mean of its divisors is an integer number (18442027968).

Almost surely, 2^{1221102030512} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221102030512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1475362237440).

1221102030512 is an abundant number, since it is smaller than the sum of its proper divisors (1729622444368).

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

1221102030512 is a wasteful number, since it uses less digits than its factorization.

1221102030512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7331 (or 7325 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 1221102030512 its reverse (2150302011221), we get a palindrome (3371404041733).

The spelling of 1221102030512 in words is "one trillion, two hundred twenty-one billion, one hundred two million, thirty thousand, five hundred twelve".