1211101000100 has 108 divisors (see below), whose sum is σ = 2938713316560. Its totient is φ = 431946662400.

The previous prime is 1211101000093. The next prime is 1211101000133. The reversal of 1211101000100 is 10001011121.

It is a happy 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 35 ways as a sum of consecutive naturals, for example, 553706 + ... + 1651905.

Almost surely, 2^{1211101000100} is an apocalyptic number.

1211101000100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211101000100 is an abundant number, since it is smaller than the sum of its proper divisors (1727612316460).

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

1211101000100 is a wasteful number, since it uses less digits than its factorization.

1211101000100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205678 (or 2205654 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 1211101000100 its reverse (10001011121), we get a palindrome (1221102011221).

The spelling of 1211101000100 in words is "one trillion, two hundred eleven billion, one hundred one million, one hundred", and thus it is an aban number.