1312203021 has 8 divisors (see below), whose sum is σ = 1852521984. Its totient is φ = 823343040.

The previous prime is 1312203019. The next prime is 1312203029. The reversal of 1312203021 is 1203022131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1312203021 - 2¹ = 1312203019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312203029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12864685 + ... + 12864786.

It is an arithmetic number, because the mean of its divisors is an integer number (231565248).

Almost surely, 2^1312203021 is an apocalyptic number.

It is an amenable number.

1312203021 is a deficient number, since it is larger than the sum of its proper divisors (540318963).

1312203021 is a wasteful number, since it uses less digits than its factorization.

1312203021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25729491.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1312203021 is about 36224.3429339995. The cubic root of 1312203021 is about 1094.7971993641.

Adding to 1312203021 its reverse (1203022131), we get a palindrome (2515225152).

The spelling of 1312203021 in words is "one billion, three hundred twelve million, two hundred three thousand, twenty-one".