2120537881 has 8 divisors (see below), whose sum is σ = 2643787584. Its totient is φ = 1652367120.

The previous prime is 2120537863. The next prime is 2120537933. The reversal of 2120537881 is 1887350212.

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 2120537881 - 2¹⁷ = 2120406809 is a prime.

It is a super-2 number, since 2×2120537881² = 8993361809511940322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120537881.

It is not an unprimeable number, because it can be changed into a prime (2120538881) 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, 13769650 + ... + 13769803.

It is an arithmetic number, because the mean of its divisors is an integer number (330473448).

Almost surely, 2^2120537881 is an apocalyptic number.

It is an amenable number.

2120537881 is a deficient number, since it is larger than the sum of its proper divisors (523249703).

2120537881 is a wasteful number, since it uses less digits than its factorization.

2120537881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27539471.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 2120537881 is about 46049.2983768483. The cubic root of 2120537881 is about 1284.7402930161.

The spelling of 2120537881 in words is "two billion, one hundred twenty million, five hundred thirty-seven thousand, eight hundred eighty-one".