111021200020000 has 120 divisors (see below), whose sum is σ = 273138537139776. Its totient is φ = 44406897696000.

The previous prime is 111021200019979. The next prime is 111021200020111. The reversal of 111021200020000 is 20002120111.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 677178037 + ... + 677341963.

Almost surely, 2^{111021200020000} is an apocalyptic number.

111021200020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111021200020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136569268569888).

111021200020000 is an abundant number, since it is smaller than the sum of its proper divisors (162117337119776).

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

111021200020000 is an equidigital number, since it uses as much as digits as its factorization.

111021200020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197820 (or 197797 counting only the distinct ones).

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

Adding to 111021200020000 its reverse (20002120111), we get a palindrome (111041202140111).

The spelling of 111021200020000 in words is "one hundred eleven trillion, twenty-one billion, two hundred million, twenty thousand".