12021231302213 has 32 divisors (see below), whose sum is σ = 15097806950400. Its totient is φ = 9332599769856.

The previous prime is 12021231302177. The next prime is 12021231302257. The reversal of 12021231302213 is 31220313212021.

It is a cyclic number.

It is not a de Polignac number, because 12021231302213 - 2²⁶ = 12021164193349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021231302713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5273645 + ... + 7200957.

It is an arithmetic number, because the mean of its divisors is an integer number (471806467200).

Almost surely, 2^{12021231302213} is an apocalyptic number.

It is an amenable number.

12021231302213 is a deficient number, since it is larger than the sum of its proper divisors (3076575648187).

12021231302213 is a wasteful number, since it uses less digits than its factorization.

12021231302213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929401.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 12021231302213 its reverse (31220313212021), we get a palindrome (43241544514234).

The spelling of 12021231302213 in words is "twelve trillion, twenty-one billion, two hundred thirty-one million, three hundred two thousand, two hundred thirteen".