213131001322 has 4 divisors (see below), whose sum is σ = 319696501986. Its totient is φ = 106565500660.

The previous prime is 213131001313. The next prime is 213131001329. The reversal of 213131001322 is 223100131312.

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

It can be written as a sum of positive squares in only one way, i.e., 143640242001 + 69490759321 = 378999^2 + 263611^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213131001322.

It is not an unprimeable number, because it can be changed into a prime (213131001329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53282750329 + ... + 53282750332.

Almost surely, 2^213131001322 is an apocalyptic number.

213131001322 is a deficient number, since it is larger than the sum of its proper divisors (106565500664).

213131001322 is a wasteful number, since it uses less digits than its factorization.

213131001322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106565500663.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 213131001322 its reverse (223100131312), we get a palindrome (436231132634).

The spelling of 213131001322 in words is "two hundred thirteen billion, one hundred thirty-one million, one thousand, three hundred twenty-two".