1110021021220 has 12 divisors (see below), whose sum is σ = 2331044144604. Its totient is φ = 444008408480.

The previous prime is 1110021021037. The next prime is 1110021021229. The reversal of 1110021021220 is 221201200111.

It can be written as a sum of positive squares in 2 ways, for example, as 700994260516 + 409026760704 = 837254^2 + 639552^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1110021021220.

It is not an unprimeable number, because it can be changed into a prime (1110021021229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27750525511 + ... + 27750525550.

It is an arithmetic number, because the mean of its divisors is an integer number (194253678717).

Almost surely, 2^{1110021021220} is an apocalyptic number.

1110021021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1110021021220 is an abundant number, since it is smaller than the sum of its proper divisors (1221023123384).

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

1110021021220 is a wasteful number, since it uses less digits than its factorization.

1110021021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55501051070 (or 55501051068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1110021021220 its reverse (221201200111), we get a palindrome (1331222221331).

The spelling of 1110021021220 in words is "one trillion, one hundred ten billion, twenty-one million, twenty-one thousand, two hundred twenty".