2121708699597 has 4 divisors (see below), whose sum is σ = 2828944932800. Its totient is φ = 1414472466396.

The previous prime is 2121708699587. The next prime is 2121708699623. The reversal of 2121708699597 is 7959968071212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2121708699597 - 2⁶ = 2121708699533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121708699587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353618116597 + ... + 353618116602.

It is an arithmetic number, because the mean of its divisors is an integer number (707236233200).

Almost surely, 2^{2121708699597} is an apocalyptic number.

It is an amenable number.

2121708699597 is a deficient number, since it is larger than the sum of its proper divisors (707236233203).

2121708699597 is an equidigital number, since it uses as much as digits as its factorization.

2121708699597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707236233202.

The product of its (nonzero) digits is 34292160, while the sum is 66.

The spelling of 2121708699597 in words is "two trillion, one hundred twenty-one billion, seven hundred eight million, six hundred ninety-nine thousand, five hundred ninety-seven".