1021111220100 has 36 divisors (see below), whose sum is σ = 2954415131024. Its totient is φ = 272296325280.

The previous prime is 1021111220089. The next prime is 1021111220177. The reversal of 1021111220100 is 10221111201.

It is a super-2 number, since 2×1021111220100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1701851734 + ... + 1701852333.

Almost surely, 2^{1021111220100} is an apocalyptic number.

1021111220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021111220100 is an abundant number, since it is smaller than the sum of its proper divisors (1933303910924).

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

1021111220100 is a wasteful number, since it uses less digits than its factorization.

1021111220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403704084 (or 3403704077 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1021111220100 its reverse (10221111201), we get a palindrome (1031332331301).

The spelling of 1021111220100 in words is "one trillion, twenty-one billion, one hundred eleven million, two hundred twenty thousand, one hundred".