1012211201100 has 72 divisors (see below), whose sum is σ = 3194906637888. Its totient is φ = 245384532800.

The previous prime is 1012211201083. The next prime is 1012211201123. The reversal of 1012211201100 is 11021122101.

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, 153362034 + ... + 153368633.

It is an arithmetic number, because the mean of its divisors is an integer number (44373703304).

Almost surely, 2^{1012211201100} is an apocalyptic number.

1012211201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012211201100 is an abundant number, since it is smaller than the sum of its proper divisors (2182695436788).

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

1012211201100 is a wasteful number, since it uses less digits than its factorization.

1012211201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306730695 (or 306730688 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1012211201100 its reverse (11021122101), we get a palindrome (1023232323201).

It can be divided in two parts, 1012 and 211201100, that added together give a palindrome (211202112).

The spelling of 1012211201100 in words is "one trillion, twelve billion, two hundred eleven million, two hundred one thousand, one hundred".