1201312223213 has 4 divisors (see below), whose sum is σ = 1212333436380. Its totient is φ = 1190291010048.

The previous prime is 1201312223203. The next prime is 1201312223219. The reversal of 1201312223213 is 3123222131021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 452986879849 + 748325343364 = 673043^2 + 865058^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201312223213 - 2²² = 1201308028909 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 (1201312223219) 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, 5510606420 + ... + 5510606637.

It is an arithmetic number, because the mean of its divisors is an integer number (303083359095).

Almost surely, 2^{1201312223213} is an apocalyptic number.

It is an amenable number.

1201312223213 is a deficient number, since it is larger than the sum of its proper divisors (11021213167).

1201312223213 is a wasteful number, since it uses less digits than its factorization.

1201312223213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11021213166.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1201312223213 its reverse (3123222131021), we get a palindrome (4324534354234).

The spelling of 1201312223213 in words is "one trillion, two hundred one billion, three hundred twelve million, two hundred twenty-three thousand, two hundred thirteen".