212331030102021 has 4 divisors (see below), whose sum is σ = 283108040136032. Its totient is φ = 141554020068012.

The previous prime is 212331030101969. The next prime is 212331030102077. The reversal of 212331030102021 is 120201030133212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212331030102021 - 2³³ = 212322440167429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212331030102221) 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, 35388505017001 + ... + 35388505017006.

It is an arithmetic number, because the mean of its divisors is an integer number (70777010034008).

Almost surely, 2^{212331030102021} is an apocalyptic number.

It is an amenable number.

212331030102021 is a deficient number, since it is larger than the sum of its proper divisors (70777010034011).

212331030102021 is an equidigital number, since it uses as much as digits as its factorization.

212331030102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70777010034010.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 212331030102021 its reverse (120201030133212), we get a palindrome (332532060235233).

The spelling of 212331030102021 in words is "two hundred twelve trillion, three hundred thirty-one billion, thirty million, one hundred two thousand, twenty-one".