2101123454 has 4 divisors (see below), whose sum is σ = 3151685184. Its totient is φ = 1050561726.

The previous prime is 2101123373. The next prime is 2101123511. The reversal of 2101123454 is 4543211012.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525280862 + ... + 525280865.

It is an arithmetic number, because the mean of its divisors is an integer number (787921296).

Almost surely, 2^2101123454 is an apocalyptic number.

2101123454 is a deficient number, since it is larger than the sum of its proper divisors (1050561730).

2101123454 is a wasteful number, since it uses less digits than its factorization.

2101123454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050561729.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2101123454 is about 45838.0131986542. The cubic root of 2101123454 is about 1280.8074848778.

Adding to 2101123454 its reverse (4543211012), we get a palindrome (6644334466).

The spelling of 2101123454 in words is "two billion, one hundred one million, one hundred twenty-three thousand, four hundred fifty-four".