1211210002100 has 72 divisors (see below), whose sum is σ = 3004222300800. Its totient is φ = 415213729920.

The previous prime is 1211210002087. The next prime is 1211210002153. The reversal of 1211210002100 is 12000121121.

It is a congruent number.

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, 5026577 + ... + 5262023.

Almost surely, 2^{1211210002100} is an apocalyptic number.

1211210002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211210002100 is an abundant number, since it is smaller than the sum of its proper divisors (1793012298700).

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

1211210002100 is a wasteful number, since it uses less digits than its factorization.

1211210002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242817 (or 242810 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1211210002100 its reverse (12000121121), we get a palindrome (1223210123221).

The spelling of 1211210002100 in words is "one trillion, two hundred eleven billion, two hundred ten million, two thousand, one hundred".