1021112211200 has 108 divisors (see below), whose sum is σ = 2531178390048. Its totient is φ = 407836262400.

The previous prime is 1021112211199. The next prime is 1021112211239. The reversal of 1021112211200 is 21122111201.

It is a congruent number.

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, 4188665 + ... + 4425735.

Almost surely, 2^{1021112211200} is an apocalyptic number.

1021112211200 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 1021112211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1265589195024).

1021112211200 is an abundant number, since it is smaller than the sum of its proper divisors (1510066178848).

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

1021112211200 is an equidigital number, since it uses as much as digits as its factorization.

1021112211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237770 (or 237751 counting only the distinct ones).

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

Adding to 1021112211200 its reverse (21122111201), we get a palindrome (1042234322401).

Subtracting from 1021112211200 its reverse (21122111201), we obtain a palindrome (999990099999).

The spelling of 1021112211200 in words is "one trillion, twenty-one billion, one hundred twelve million, two hundred eleven thousand, two hundred".