1210112001 has 64 divisors (see below), whose sum is σ = 2145484800. Its totient is φ = 659534400.

The previous prime is 1210111997. The next prime is 1210112009. The reversal of 1210112001 is 1002110121.

It is a happy number.

It is not a de Polignac number, because 1210112001 - 2² = 1210111997 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1210112009) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 414535 + ... + 417443.

It is an arithmetic number, because the mean of its divisors is an integer number (33523200).

Almost surely, 2^1210112001 is an apocalyptic number.

It is an amenable number.

1210112001 is a deficient number, since it is larger than the sum of its proper divisors (935372799).

1210112001 is a wasteful number, since it uses less digits than its factorization.

1210112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027 (or 3021 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1210112001 is about 34786.6641257825. The cubic root of 1210112001 is about 1065.6351141313.

Adding to 1210112001 its reverse (1002110121), we get a palindrome (2212222122).

The spelling of 1210112001 in words is "one billion, two hundred ten million, one hundred twelve thousand, one".