1050121613 has 4 divisors (see below), whose sum is σ = 1050220668. Its totient is φ = 1050022560.

The previous prime is 1050121601. The next prime is 1050121627. The reversal of 1050121613 is 3161210501.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 60264169 + 989857444 = 7763^2 + 31462^2 .

It is a cyclic number.

It is not a de Polignac number, because 1050121613 - 2⁶ = 1050121549 is a prime.

It is a super-2 number, since 2×1050121613² = 2205510804179443538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1050121213) 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, 31418 + ... + 55563.

It is an arithmetic number, because the mean of its divisors is an integer number (262555167).

Almost surely, 2^1050121613 is an apocalyptic number.

It is an amenable number.

1050121613 is a deficient number, since it is larger than the sum of its proper divisors (99055).

1050121613 is an equidigital number, since it uses as much as digits as its factorization.

1050121613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99054.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1050121613 is about 32405.5799670365. The cubic root of 1050121613 is about 1016.4355956207.

The spelling of 1050121613 in words is "one billion, fifty million, one hundred twenty-one thousand, six hundred thirteen".