12021331122231 has 4 divisors (see below), whose sum is σ = 16028441496312. Its totient is φ = 8014220748152.

The previous prime is 12021331122197. The next prime is 12021331122239. The reversal of 12021331122231 is 13222113312021.

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

It is a cyclic number.

It is not a de Polignac number, because 12021331122231 - 2¹⁵ = 12021331089463 is a prime.

It is a super-2 number, since 2×12021331122231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021331122239) 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, 2003555187036 + ... + 2003555187041.

It is an arithmetic number, because the mean of its divisors is an integer number (4007110374078).

Almost surely, 2^{12021331122231} is an apocalyptic number.

12021331122231 is a deficient number, since it is larger than the sum of its proper divisors (4007110374081).

12021331122231 is an equidigital number, since it uses as much as digits as its factorization.

12021331122231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007110374080.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 12021331122231 its reverse (13222113312021), we get a palindrome (25243444434252).

The spelling of 12021331122231 in words is "twelve trillion, twenty-one billion, three hundred thirty-one million, one hundred twenty-two thousand, two hundred thirty-one".