1211031000100 has 18 divisors (see below), whose sum is σ = 2627937270434. Its totient is φ = 484412400000.

The previous prime is 1211031000097. The next prime is 1211031000107. The reversal of 1211031000100 is 10001301121.

It can be written as a sum of positive squares in 3 ways, for example, as 164044864 + 1210866955236 = 12808^2 + 1100394^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1211031000107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6055154901 + ... + 6055155100.

Almost surely, 2^{1211031000100} is an apocalyptic number.

1211031000100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211031000100 is an abundant number, since it is smaller than the sum of its proper divisors (1416906270334).

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

1211031000100 is a wasteful number, since it uses less digits than its factorization.

1211031000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12110310015 (or 12110310008 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 1211031000100 its reverse (10001301121), we get a palindrome (1221032301221).

The spelling of 1211031000100 in words is "one trillion, two hundred eleven billion, thirty-one million, one hundred", and thus it is an aban number.