2129423263451 has 4 divisors (see below), whose sum is σ = 2323007196504. Its totient is φ = 1935839330400.

The previous prime is 2129423263399. The next prime is 2129423263459. The reversal of 2129423263451 is 1543623249212.

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 2129423263451 - 2¹⁴ = 2129423247067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2129423263459) 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, 96791966510 + ... + 96791966531.

It is an arithmetic number, because the mean of its divisors is an integer number (580751799126).

Almost surely, 2^{2129423263451} is an apocalyptic number.

2129423263451 is a deficient number, since it is larger than the sum of its proper divisors (193583933053).

2129423263451 is a wasteful number, since it uses less digits than its factorization.

2129423263451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193583933052.

The product of its digits is 622080, while the sum is 44.

The spelling of 2129423263451 in words is "two trillion, one hundred twenty-nine billion, four hundred twenty-three million, two hundred sixty-three thousand, four hundred fifty-one".