1313012121 has 8 divisors (see below), whose sum is σ = 1756914144. Its totient is φ = 872225760.

The previous prime is 1313012101. The next prime is 1313012123. The reversal of 1313012121 is 1212103131.

It is a happy number.

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

It is not a de Polignac number, because 1313012121 - 2⁷ = 1313011993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1313012121.

It is not an unprimeable number, because it can be changed into a prime (1313012123) 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, 777931 + ... + 779616.

It is an arithmetic number, because the mean of its divisors is an integer number (219614268).

Almost surely, 2^1313012121 is an apocalyptic number.

It is an amenable number.

1313012121 is a deficient number, since it is larger than the sum of its proper divisors (443902023).

1313012121 is a wasteful number, since it uses less digits than its factorization.

1313012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557831.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1313012121 is about 36235.5091174389. The cubic root of 1313012121 is about 1095.0221692307.

Adding to 1313012121 its reverse (1212103131), we get a palindrome (2525115252).

The spelling of 1313012121 in words is "one billion, three hundred thirteen million, twelve thousand, one hundred twenty-one".