1211011102100 has 36 divisors (see below), whose sum is σ = 2672434682400. Its totient is φ = 476194193760.

The previous prime is 1211011102097. The next prime is 1211011102117. The reversal of 1211011102100 is 12011101121.

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 11 ways as a sum of consecutive naturals, for example, 102622160 + ... + 102633959.

Almost surely, 2^{1211011102100} is an apocalyptic number.

1211011102100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211011102100 is an abundant number, since it is smaller than the sum of its proper divisors (1461423580300).

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

1211011102100 is a wasteful number, since it uses less digits than its factorization.

1211011102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205256192 (or 205256185 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1211011102100 its reverse (12011101121), we get a palindrome (1223022203221).

The spelling of 1211011102100 in words is "one trillion, two hundred eleven billion, eleven million, one hundred two thousand, one hundred".