2120641511 has 4 divisors (see below), whose sum is σ = 2121111024. Its totient is φ = 2120172000.

The previous prime is 2120641487. The next prime is 2120641541. The reversal of 2120641511 is 1151460212.

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

It is a cyclic number.

It is not a de Polignac number, because 2120641511 - 2¹⁴ = 2120625127 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 (2120641541) 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, 227915 + ... + 237036.

It is an arithmetic number, because the mean of its divisors is an integer number (530277756).

Almost surely, 2^2120641511 is an apocalyptic number.

2120641511 is a deficient number, since it is larger than the sum of its proper divisors (469513).

2120641511 is an equidigital number, since it uses as much as digits as its factorization.

2120641511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469512.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 2120641511 is about 46050.4235702561. The cubic root of 2120641511 is about 1284.7612209560.

The spelling of 2120641511 in words is "two billion, one hundred twenty million, six hundred forty-one thousand, five hundred eleven".