2102154234231 has 4 divisors (see below), whose sum is σ = 2802872312312. Its totient is φ = 1401436156152.

The previous prime is 2102154234227. The next prime is 2102154234253. The reversal of 2102154234231 is 1324324512012.

It is a happy number.

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

It is not a de Polignac number, because 2102154234231 - 2² = 2102154234227 is a prime.

It is a super-2 number, since 2×2102154234231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102154234731) 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, 350359039036 + ... + 350359039041.

It is an arithmetic number, because the mean of its divisors is an integer number (700718078078).

Almost surely, 2^{2102154234231} is an apocalyptic number.

2102154234231 is a deficient number, since it is larger than the sum of its proper divisors (700718078081).

2102154234231 is an equidigital number, since it uses as much as digits as its factorization.

2102154234231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700718078080.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 2102154234231 its reverse (1324324512012), we get a palindrome (3426478746243).

The spelling of 2102154234231 in words is "two trillion, one hundred two billion, one hundred fifty-four million, two hundred thirty-four thousand, two hundred thirty-one".