2120136591 has 8 divisors (see below), whose sum is σ = 2865573040. Its totient is φ = 1394062272.

The previous prime is 2120136547. The next prime is 2120136631. The reversal of 2120136591 is 1956310212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2120136591 - 2⁷ = 2120136463 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 (2120136541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4840276 + ... + 4840713.

It is an arithmetic number, because the mean of its divisors is an integer number (358196630).

Almost surely, 2^2120136591 is an apocalyptic number.

2120136591 is a deficient number, since it is larger than the sum of its proper divisors (745436449).

2120136591 is an equidigital number, since it uses as much as digits as its factorization.

2120136591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9681065.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 2120136591 is about 46044.9409924695. The cubic root of 2120136591 is about 1284.6592466047.

The spelling of 2120136591 in words is "two billion, one hundred twenty million, one hundred thirty-six thousand, five hundred ninety-one".