2154131101 has 4 divisors (see below), whose sum is σ = 2155514400. Its totient is φ = 2152747804.

The previous prime is 2154131087. The next prime is 2154131129. The reversal of 2154131101 is 1011314512.

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 2154131101 - 2²⁹ = 1617260189 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 (2154131141) 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, 689311 + ... + 692428.

It is an arithmetic number, because the mean of its divisors is an integer number (538878600).

Almost surely, 2^2154131101 is an apocalyptic number.

It is an amenable number.

2154131101 is a deficient number, since it is larger than the sum of its proper divisors (1383299).

2154131101 is a wasteful number, since it uses less digits than its factorization.

2154131101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383298.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 2154131101 is about 46412.6179072028. The cubic root of 2154131101 is about 1291.4889965507.

Adding to 2154131101 its reverse (1011314512), we get a palindrome (3165445613).

The spelling of 2154131101 in words is "two billion, one hundred fifty-four million, one hundred thirty-one thousand, one hundred one".