1210013100 has 288 divisors, whose sum is σ = 4152512000. Its totient is φ = 301397760.

The previous prime is 1210013087. The next prime is 1210013137. The reversal of 1210013100 is 13100121.

It is a super-2 number, since 2×1210013100² = 2928263404343220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5283786 + ... + 5284014.

Almost surely, 2^1210013100 is an apocalyptic number.

1210013100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210013100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2076256000).

1210013100 is an abundant number, since it is smaller than the sum of its proper divisors (2942498900).

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

1210013100 is a wasteful number, since it uses less digits than its factorization.

1210013100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1210013100 is about 34785.2425606032. The cubic root of 1210013100 is about 1065.6060823145.

Adding to 1210013100 its reverse (13100121), we get a palindrome (1223113221).

It can be divided in two parts, 12100 and 13100, that added together give a triangular number (25200 = T₂₂₄).

The spelling of 1210013100 in words is "one billion, two hundred ten million, thirteen thousand, one hundred".