2123191701 has 6 divisors (see below), whose sum is σ = 3066832470. Its totient is φ = 1415461128.

The previous prime is 2123191699. The next prime is 2123191723. The reversal of 2123191701 is 1071913212.

It can be written as a sum of positive squares in only one way, i.e., 2122813476 + 378225 = 46074^2 + 615^2 .

It is not a de Polignac number, because 2123191701 - 2¹ = 2123191699 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123191751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117955086 + ... + 117955103.

It is an arithmetic number, because the mean of its divisors is an integer number (511138745).

Almost surely, 2^2123191701 is an apocalyptic number.

It is an amenable number.

2123191701 is a deficient number, since it is larger than the sum of its proper divisors (943640769).

2123191701 is a wasteful number, since it uses less digits than its factorization.

2123191701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235910195 (or 235910192 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 2123191701 is about 46078.1043555396. The cubic root of 2123191701 is about 1285.2760137254.

It can be divided in two parts, 212 and 3191701, that added together give a palindrome (3191913).

The spelling of 2123191701 in words is "two billion, one hundred twenty-three million, one hundred ninety-one thousand, seven hundred one".