2129668201 has 4 divisors (see below), whose sum is σ = 2158841812. Its totient is φ = 2100494592.

The previous prime is 2129668193. The next prime is 2129668223. The reversal of 2129668201 is 1028669212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1825340176 + 304328025 = 42724^2 + 17445^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129668201 - 2³ = 2129668193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2129668291) 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, 14586696 + ... + 14586841.

It is an arithmetic number, because the mean of its divisors is an integer number (539710453).

Almost surely, 2^2129668201 is an apocalyptic number.

It is an amenable number.

2129668201 is a deficient number, since it is larger than the sum of its proper divisors (29173611).

2129668201 is an equidigital number, since it uses as much as digits as its factorization.

2129668201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29173610.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 2129668201 is about 46148.3282579120. The cubic root of 2129668201 is about 1286.5815388911.

The spelling of 2129668201 in words is "two billion, one hundred twenty-nine million, six hundred sixty-eight thousand, two hundred one".