1210101111100 has 72 divisors (see below), whose sum is σ = 3177583184160. Its totient is φ = 390486405120.

The previous prime is 1210101111061. The next prime is 1210101111179. The reversal of 1210101111100 is 11111010121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50832685 + ... + 50856484.

It is an arithmetic number, because the mean of its divisors is an integer number (44133099780).

Almost surely, 2^{1210101111100} is an apocalyptic number.

1210101111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210101111100 is an abundant number, since it is smaller than the sum of its proper divisors (1967482073060).

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

1210101111100 is a wasteful number, since it uses less digits than its factorization.

1210101111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101689207 (or 101689200 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 1210101111100 its reverse (11111010121), we get a palindrome (1221212121221).

The spelling of 1210101111100 in words is "one trillion, two hundred ten billion, one hundred one million, one hundred eleven thousand, one hundred".