2154120213 has 12 divisors (see below), whose sum is σ = 3341084640. Its totient is φ = 1230925752.

The previous prime is 2154120211. The next prime is 2154120251. The reversal of 2154120213 is 3120214512.

It is not a de Polignac number, because 2154120213 - 2¹ = 2154120211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 2154120213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154120211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7326793 + ... + 7327086.

It is an arithmetic number, because the mean of its divisors is an integer number (278423720).

Almost surely, 2^2154120213 is an apocalyptic number.

It is an amenable number.

2154120213 is a deficient number, since it is larger than the sum of its proper divisors (1186964427).

2154120213 is a wasteful number, since it uses less digits than its factorization.

2154120213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14653896 (or 14653889 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2154120213 is about 46412.5006113655. The cubic root of 2154120213 is about 1291.4868206145.

Adding to 2154120213 its reverse (3120214512), we get a palindrome (5274334725).

The spelling of 2154120213 in words is "two billion, one hundred fifty-four million, one hundred twenty thousand, two hundred thirteen".