1203102001021 has 4 divisors (see below), whose sum is σ = 1203683492700. Its totient is φ = 1202520509344.

The previous prime is 1203102001007. The next prime is 1203102001051. The reversal of 1203102001021 is 1201002013021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163528036996 + 1039573964025 = 404386^2 + 1019595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203102001021 - 2⁹ = 1203102000509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203102000992 and 1203102001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203102001051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290742736 + ... + 290746873.

It is an arithmetic number, because the mean of its divisors is an integer number (300920873175).

Almost surely, 2^{1203102001021} is an apocalyptic number.

It is an amenable number.

1203102001021 is a deficient number, since it is larger than the sum of its proper divisors (581491679).

1203102001021 is an equidigital number, since it uses as much as digits as its factorization.

1203102001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581491678.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1203102001021 its reverse (1201002013021), we get a palindrome (2404104014042).

The spelling of 1203102001021 in words is "one trillion, two hundred three billion, one hundred two million, one thousand, twenty-one".