2121135719 has 10 divisors (see below), whose sum is σ = 2197623000. Its totient is φ = 2047310216.

The previous prime is 2121135683. The next prime is 2121135767. The reversal of 2121135719 is 9175311212.

It is a happy number.

It is not a de Polignac number, because 2121135719 - 2²⁰ = 2120087143 is a prime.

It is a super-2 number, since 2×2121135719² = 8998433476835293922, 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 (2121105719) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 705782 + ... + 708780.

It is an arithmetic number, because the mean of its divisors is an integer number (219762300).

Almost surely, 2^2121135719 is an apocalyptic number.

2121135719 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2121135719 is a deficient number, since it is larger than the sum of its proper divisors (76487281).

2121135719 is an frugal number, since it uses more digits than its factorization.

2121135719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115 (or 3028 counting only the distinct ones).

The product of its digits is 3780, while the sum is 32.

The square root of 2121135719 is about 46055.7892017931. The cubic root of 2121135719 is about 1284.8610162228.

The spelling of 2121135719 in words is "two billion, one hundred twenty-one million, one hundred thirty-five thousand, seven hundred nineteen".