2011220012100 has 72 divisors (see below), whose sum is σ = 6266755290880. Its totient is φ = 495069540480.

The previous prime is 2011220012069. The next prime is 2011220012111. The reversal of 2011220012100 is 12100221102.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 257844820 + ... + 257852619.

Almost surely, 2^{2011220012100} is an apocalyptic number.

2011220012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011220012100 is an abundant number, since it is smaller than the sum of its proper divisors (4255535278780).

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

2011220012100 is a wasteful number, since it uses less digits than its factorization.

2011220012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515697469 (or 515697462 counting only the distinct ones).

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

Adding to 2011220012100 its reverse (12100221102), we get a palindrome (2023320233202).

The spelling of 2011220012100 in words is "two trillion, eleven billion, two hundred twenty million, twelve thousand, one hundred".