111021021220100 has 18 divisors (see below), whose sum is σ = 240915616047834. Its totient is φ = 44408408488000.

The previous prime is 111021021220079. The next prime is 111021021220117. The reversal of 111021021220100 is 1022120120111.

It can be written as a sum of positive squares in 3 ways, for example, as 42002043136 + 110979019176964 = 204944^2 + 10534658^2 .

It is a super-3 number, since 3×111021021220100³ (a number of 43 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555105106001 + ... + 555105106200.

Almost surely, 2^{111021021220100} is an apocalyptic number.

111021021220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021021220100 is an abundant number, since it is smaller than the sum of its proper divisors (129894594827734).

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

111021021220100 is a wasteful number, since it uses less digits than its factorization.

111021021220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110210212215 (or 1110210212208 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111021021220100 its reverse (1022120120111), we get a palindrome (112043141340211).

The spelling of 111021021220100 in words is "one hundred eleven trillion, twenty-one billion, twenty-one million, two hundred twenty thousand, one hundred".