1202110001001 has 36 divisors (see below), whose sum is σ = 2148826687488. Its totient is φ = 634079994912.

The previous prime is 1202110000981. The next prime is 1202110001003. The reversal of 1202110001001 is 1001000112021.

It is a happy number.

It is not a de Polignac number, because 1202110001001 - 2⁶ = 1202110000937 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1202110001003) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 56442345 + ... + 56463638.

It is an arithmetic number, because the mean of its divisors is an integer number (59689630208).

Almost surely, 2^{1202110001001} is an apocalyptic number.

It is an amenable number.

1202110001001 is a deficient number, since it is larger than the sum of its proper divisors (946716686487).

1202110001001 is a wasteful number, since it uses less digits than its factorization.

1202110001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112906022 (or 112906006 counting only the distinct ones).

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

Adding to 1202110001001 its reverse (1001000112021), we get a palindrome (2203110113022).

The spelling of 1202110001001 in words is "one trillion, two hundred two billion, one hundred ten million, one thousand, one".