2120748137 has 4 divisors (see below), whose sum is σ = 2232366480. Its totient is φ = 2009129796.

The previous prime is 2120748121. The next prime is 2120748167. The reversal of 2120748137 is 7318470212.

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 a cyclic number.

It is not a de Polignac number, because 2120748137 - 2⁴ = 2120748121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120748097 and 2120748106.

It is not an unprimeable number, because it can be changed into a prime (2120748107) 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, 55809143 + ... + 55809180.

It is an arithmetic number, because the mean of its divisors is an integer number (558091620).

Almost surely, 2^2120748137 is an apocalyptic number.

It is an amenable number.

2120748137 is a deficient number, since it is larger than the sum of its proper divisors (111618343).

2120748137 is a wasteful number, since it uses less digits than its factorization.

2120748137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111618342.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 2120748137 is about 46051.5812649251. The cubic root of 2120748137 is about 1284.7827532224.

The spelling of 2120748137 in words is "two billion, one hundred twenty million, seven hundred forty-eight thousand, one hundred thirty-seven".