1371212213 has 4 divisors (see below), whose sum is σ = 1567099680. Its totient is φ = 1175324748.

The previous prime is 1371212209. The next prime is 1371212221. The reversal of 1371212213 is 3122121731.

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 a cyclic number.

It is not a de Polignac number, because 1371212213 - 2² = 1371212209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371212203) 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, 97943723 + ... + 97943736.

It is an arithmetic number, because the mean of its divisors is an integer number (391774920).

Almost surely, 2^1371212213 is an apocalyptic number.

It is an amenable number.

1371212213 is a deficient number, since it is larger than the sum of its proper divisors (195887467).

1371212213 is an equidigital number, since it uses as much as digits as its factorization.

1371212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195887466.

The product of its digits is 504, while the sum is 23.

The square root of 1371212213 is about 37029.8827030278. The cubic root of 1371212213 is about 1110.9680198239.

Adding to 1371212213 its reverse (3122121731), we get a palindrome (4493333944).

The spelling of 1371212213 in words is "one billion, three hundred seventy-one million, two hundred twelve thousand, two hundred thirteen".