1100212001220 has 48 divisors (see below), whose sum is σ = 3080747013120. Its totient is φ = 293375256576.

The previous prime is 1100212001191. The next prime is 1100212001233. The reversal of 1100212001220 is 221002120011.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1100212001196 and 1100212001205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786276 + ... + 1678884.

It is an arithmetic number, because the mean of its divisors is an integer number (64182229440).

Almost surely, 2^{1100212001220} is an apocalyptic number.

1100212001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100212001220 is an abundant number, since it is smaller than the sum of its proper divisors (1980535011900).

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

1100212001220 is a wasteful number, since it uses less digits than its factorization.

1100212001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913164 (or 913162 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1100212001220 its reverse (221002120011), we get a palindrome (1321214121231).

The spelling of 1100212001220 in words is "one trillion, one hundred billion, two hundred twelve million, one thousand, two hundred twenty".