111021020002100 has 36 divisors (see below), whose sum is σ = 259447583669484. Its totient is φ = 40992376615680.

The previous prime is 111021020002099. The next prime is 111021020002103. The reversal of 111021020002100 is 1200020120111.

It can be written as a sum of positive squares in 6 ways, for example, as 25664781545764 + 85356238456336 = 5066042^2 + 9238844^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021020002103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42700391009 + ... + 42700393608.

Almost surely, 2^{111021020002100} is an apocalyptic number.

111021020002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021020002100 is an abundant number, since it is smaller than the sum of its proper divisors (148426563667384).

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

111021020002100 is a wasteful number, since it uses less digits than its factorization.

111021020002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85400784644 (or 85400784637 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111021020002100 its reverse (1200020120111), we get a palindrome (112221040122211).

The spelling of 111021020002100 in words is "one hundred eleven trillion, twenty-one billion, twenty million, two thousand, one hundred".