213212211020231 has 4 divisors (see below), whose sum is σ = 213216156745032. Its totient is φ = 213208265295432.

The previous prime is 213212211020219. The next prime is 213212211020233. The reversal of 213212211020231 is 132020112212312.

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 213212211020231 - 2³⁰ = 213211137278407 is a prime.

It is a super-2 number, since 2×213212211020231² (a number of 29 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 = 213212211020197 and 213212211020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213212211020233) 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, 1972781345 + ... + 1972889418.

It is an arithmetic number, because the mean of its divisors is an integer number (53304039186258).

Almost surely, 2^{213212211020231} is an apocalyptic number.

213212211020231 is a deficient number, since it is larger than the sum of its proper divisors (3945724801).

213212211020231 is an equidigital number, since it uses as much as digits as its factorization.

213212211020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945724800.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 213212211020231 its reverse (132020112212312), we get a palindrome (345232323232543).

The spelling of 213212211020231 in words is "two hundred thirteen trillion, two hundred twelve billion, two hundred eleven million, twenty thousand, two hundred thirty-one".