1312202121 has 8 divisors (see below), whose sum is σ = 1809934080. Its totient is φ = 844635792.

The previous prime is 1312202113. The next prime is 1312202123. The reversal of 1312202121 is 1212022131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1312202121 - 2³ = 1312202113 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312202121.

It is not an unprimeable number, because it can be changed into a prime (1312202123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7541305 + ... + 7541478.

It is an arithmetic number, because the mean of its divisors is an integer number (226241760).

Almost surely, 2^1312202121 is an apocalyptic number.

It is an amenable number.

1312202121 is a deficient number, since it is larger than the sum of its proper divisors (497731959).

1312202121 is a wasteful number, since it uses less digits than its factorization.

1312202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15082815.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1312202121 is about 36224.3305114118. The cubic root of 1312202121 is about 1094.7969490680.

Adding to 1312202121 its reverse (1212022131), we get a palindrome (2524224252).

The spelling of 1312202121 in words is "one billion, three hundred twelve million, two hundred two thousand, one hundred twenty-one".