2123951912119 has 4 divisors (see below), whose sum is σ = 2123955308880.
Its totient is φ = 2123948515360.
The previous prime is 2123951912113. The next prime is 2123951912233. The reversal of 2123951912119 is 9112191593212.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 2123951912119 - 29 = 2123951911607 is a prime.
It is a super-2 number, since 2×21239519121192 (a number of 25 digits) 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 (2123951912113) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458947 + ... + 2111524.
It is an arithmetic number, because the mean of its divisors is an integer number (530988827220).
Almost surely, 22123951912119 is an apocalyptic number.
2123951912119 is a deficient number, since it is larger than the sum of its proper divisors (3396761).
2123951912119 is an equidigital number, since it uses as much as digits as its factorization.
2123951912119 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3396760.
The product of its digits is 87480, while the sum is 46.
The spelling of 2123951912119 in words is "two trillion, one hundred twenty-three billion, nine hundred fifty-one million, nine hundred twelve thousand, one hundred nineteen".