1220221121010 has 16 divisors (see below), whose sum is σ = 2928530690496. Its totient is φ = 325392298928.

The previous prime is 1220221120999. The next prime is 1220221121069. The reversal of 1220221121010 is 101211220221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20337018654 + ... + 20337018713.

It is an arithmetic number, because the mean of its divisors is an integer number (183033168156).

Almost surely, 2^{1220221121010} is an apocalyptic number.

1220221121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220221121010 is an abundant number, since it is smaller than the sum of its proper divisors (1708309569486).

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

1220221121010 is a wasteful number, since it uses less digits than its factorization.

1220221121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40674037377.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220221121010 its reverse (101211220221), we get a palindrome (1321432341231).

The spelling of 1220221121010 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, ten".