1111020120000 has 630 divisors, whose sum is σ = 4629170759928. Its totient is φ = 253943424000.

The previous prime is 1111020119977. The next prime is 1111020120031. The reversal of 1111020120000 is 210201111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (630).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 17608509 + ... + 17671491.

Almost surely, 2^{1111020120000} is an apocalyptic number.

1111020120000 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 1111020120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2314585379964).

1111020120000 is an abundant number, since it is smaller than the sum of its proper divisors (3518150639928).

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

1111020120000 is an equidigital number, since it uses as much as digits as its factorization.

1111020120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63035 (or 63000 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1111020120000 its reverse (210201111), we get a palindrome (1111230321111).

The spelling of 1111020120000 in words is "one trillion, one hundred eleven billion, twenty million, one hundred twenty thousand".