12312201021 has 8 divisors (see below), whose sum is σ = 16685387424. Its totient is φ = 8073574320.

The previous prime is 12312200959. The next prime is 12312201061. The reversal of 12312201021 is 12010221321.

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

It is not a de Polignac number, because 12312201021 - 2²³ = 12303812413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312201061) 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, 33639711 + ... + 33640076.

It is an arithmetic number, because the mean of its divisors is an integer number (2085673428).

Almost surely, 2^12312201021 is an apocalyptic number.

It is an amenable number.

12312201021 is a deficient number, since it is larger than the sum of its proper divisors (4373186403).

12312201021 is an equidigital number, since it uses as much as digits as its factorization.

12312201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67279851.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12312201021 its reverse (12010221321), we get a palindrome (24322422342).

The spelling of 12312201021 in words is "twelve billion, three hundred twelve million, two hundred one thousand, twenty-one".