31212010221223 has 4 divisors (see below), whose sum is σ = 33612934084408. Its totient is φ = 28811086358040.

The previous prime is 31212010221209. The next prime is 31212010221289. The reversal of 31212010221223 is 32212201021213.

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-31212010221223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31212010221194 and 31212010221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212010221323) 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, 1200461931573 + ... + 1200461931598.

It is an arithmetic number, because the mean of its divisors is an integer number (8403233521102).

Almost surely, 2^{31212010221223} is an apocalyptic number.

31212010221223 is a deficient number, since it is larger than the sum of its proper divisors (2400923863185).

31212010221223 is a wasteful number, since it uses less digits than its factorization.

31212010221223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400923863184.

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

Adding to 31212010221223 its reverse (32212201021213), we get a palindrome (63424211242436).

The spelling of 31212010221223 in words is "thirty-one trillion, two hundred twelve billion, ten million, two hundred twenty-one thousand, two hundred twenty-three".