1310121421 has 16 divisors (see below), whose sum is σ = 1614533760. Its totient is φ = 1037905920.

The previous prime is 1310121413. The next prime is 1310121431. The reversal of 1310121421 is 1241210131.

It is a cyclic number.

It is not a de Polignac number, because 1310121421 - 2³ = 1310121413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1310121395 and 1310121404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310121431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114676 + ... + 125581.

It is an arithmetic number, because the mean of its divisors is an integer number (100908360).

Almost surely, 2^1310121421 is an apocalyptic number.

It is an amenable number.

1310121421 is a deficient number, since it is larger than the sum of its proper divisors (304412339).

1310121421 is a wasteful number, since it uses less digits than its factorization.

1310121421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240324.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1310121421 is about 36195.5994701013. The cubic root of 1310121421 is about 1094.2179861556.

Adding to 1310121421 its reverse (1241210131), we get a palindrome (2551331552).

The spelling of 1310121421 in words is "one billion, three hundred ten million, one hundred twenty-one thousand, four hundred twenty-one".