2121102254 has 4 divisors (see below), whose sum is σ = 3181653384. Its totient is φ = 1060551126.

The previous prime is 2121102233. The next prime is 2121102287. The reversal of 2121102254 is 4522011212.

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

It is a Curzon number.

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, 530275562 + ... + 530275565.

It is an arithmetic number, because the mean of its divisors is an integer number (795413346).

Almost surely, 2^2121102254 is an apocalyptic number.

2121102254 is a deficient number, since it is larger than the sum of its proper divisors (1060551130).

2121102254 is a wasteful number, since it uses less digits than its factorization.

2121102254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060551129.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2121102254 is about 46055.4258909849. The cubic root of 2121102254 is about 1284.8542591352.

Adding to 2121102254 its reverse (4522011212), we get a palindrome (6643113466).

The spelling of 2121102254 in words is "two billion, one hundred twenty-one million, one hundred two thousand, two hundred fifty-four".