2231312122021 has 8 divisors (see below), whose sum is σ = 2235904080480. Its totient is φ = 2226723349488.

The previous prime is 2231312122003. The next prime is 2231312122027. The reversal of 2231312122021 is 1202212131322.

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

It is a cyclic number.

It is not a de Polignac number, because 2231312122021 - 2¹³ = 2231312113829 is a prime.

It is a super-3 number, since 3×2231312122021³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2231312121983 and 2231312122001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231312122027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608235 + ... + 2198311.

It is an arithmetic number, because the mean of its divisors is an integer number (279488010060).

Almost surely, 2^{2231312122021} is an apocalyptic number.

It is an amenable number.

2231312122021 is a deficient number, since it is larger than the sum of its proper divisors (4591958459).

2231312122021 is a wasteful number, since it uses less digits than its factorization.

2231312122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592963.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2231312122021 its reverse (1202212131322), we get a palindrome (3433524253343).

The spelling of 2231312122021 in words is "two trillion, two hundred thirty-one billion, three hundred twelve million, one hundred twenty-two thousand, twenty-one".