2151120123541 has 8 divisors (see below), whose sum is σ = 2165606163000. Its totient is φ = 2136634737600.

The previous prime is 2151120123521. The next prime is 2151120123589. The reversal of 2151120123541 is 1453210211512.

It can be written as a sum of positive squares in 4 ways, for example, as 412875642916 + 1738244480625 = 642554^2 + 1318425^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2151120123541 - 2¹⁵ = 2151120090773 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 (2151120123511) 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, 7716691 + ... + 7990591.

It is an arithmetic number, because the mean of its divisors is an integer number (270700770375).

Almost surely, 2^{2151120123541} is an apocalyptic number.

It is an amenable number.

2151120123541 is a deficient number, since it is larger than the sum of its proper divisors (14486039459).

2151120123541 is a wasteful number, since it uses less digits than its factorization.

2151120123541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326759.

The product of its (nonzero) digits is 2400, while the sum is 28.

The spelling of 2151120123541 in words is "two trillion, one hundred fifty-one billion, one hundred twenty million, one hundred twenty-three thousand, five hundred forty-one".