220121011000 has 64 divisors (see below), whose sum is σ = 561908936160. Its totient is φ = 80044000000.

The previous prime is 220121010983. The next prime is 220121011003. The reversal of 220121011000 is 110121022.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121011003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9994501 + ... + 10016500.

Almost surely, 2^220121011000 is an apocalyptic number.

220121011000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121011000 is an abundant number, since it is smaller than the sum of its proper divisors (341787925160).

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

220121011000 is a wasteful number, since it uses less digits than its factorization.

220121011000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20011033 (or 20011019 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 220121011000 its reverse (110121022), we get a palindrome (220231132022).

The spelling of 220121011000 in words is "two hundred twenty billion, one hundred twenty-one million, eleven thousand".