2231121209519 has 2 divisors, whose sum is σ = 2231121209520. Its totient is φ = 2231121209518.

The previous prime is 2231121209437. The next prime is 2231121209573. The reversal of 2231121209519 is 9159021211322.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2231121209519 is a prime.

It is a super-3 number, since 3×2231121209519³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231121206519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115560604759 + 1115560604760.

It is an arithmetic number, because the mean of its divisors is an integer number (1115560604760).

Almost surely, 2^{2231121209519} is an apocalyptic number.

2231121209519 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231121209519 is an equidigital number, since it uses as much as digits as its factorization.

2231121209519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 2231121209519 in words is "two trillion, two hundred thirty-one billion, one hundred twenty-one million, two hundred nine thousand, five hundred nineteen".