231303212122021 has 16 divisors (see below), whose sum is σ = 250167228502464. Its totient is φ = 212593416205824.

The previous prime is 231303212122009. The next prime is 231303212122027. The reversal of 231303212122021 is 120221212303132.

It is a cyclic number.

It is not a de Polignac number, because 231303212122021 - 2⁴³ = 222507119099813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231303212122027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19243276 + ... + 28860181.

It is an arithmetic number, because the mean of its divisors is an integer number (15635451781404).

Almost surely, 2^{231303212122021} is an apocalyptic number.

It is an amenable number.

231303212122021 is a deficient number, since it is larger than the sum of its proper divisors (18864016380443).

231303212122021 is a wasteful number, since it uses less digits than its factorization.

231303212122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48105060.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 231303212122021 its reverse (120221212303132), we get a palindrome (351524424425153).

The spelling of 231303212122021 in words is "two hundred thirty-one trillion, three hundred three billion, two hundred twelve million, one hundred twenty-two thousand, twenty-one".