2121202322231 has 4 divisors (see below), whose sum is σ = 2124511530864. Its totient is φ = 2117893113600.

The previous prime is 2121202322219. The next prime is 2121202322249. The reversal of 2121202322231 is 1322232021212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121202322231 is a prime.

It is a super-2 number, since 2×2121202322231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121202322197 and 2121202322206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121202322431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654603355 + ... + 1654604636.

It is an arithmetic number, because the mean of its divisors is an integer number (531127882716).

Almost surely, 2^{2121202322231} is an apocalyptic number.

2121202322231 is a deficient number, since it is larger than the sum of its proper divisors (3309208633).

2121202322231 is an equidigital number, since it uses as much as digits as its factorization.

2121202322231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309208632.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 2121202322231 its reverse (1322232021212), we get a palindrome (3443434343443).

The spelling of 2121202322231 in words is "two trillion, one hundred twenty-one billion, two hundred two million, three hundred twenty-two thousand, two hundred thirty-one".