2121100023 has 8 divisors (see below), whose sum is σ = 3232152448. Its totient is φ = 1212057144.

The previous prime is 2121100021. The next prime is 2121100097. The reversal of 2121100023 is 3200011212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121100023 - 2¹ = 2121100021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121099981 and 2121100008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121100021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50502361 + ... + 50502402.

It is an arithmetic number, because the mean of its divisors is an integer number (404019056).

Almost surely, 2^2121100023 is an apocalyptic number.

2121100023 is a deficient number, since it is larger than the sum of its proper divisors (1111052425).

2121100023 is a wasteful number, since it uses less digits than its factorization.

2121100023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101004773.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2121100023 is about 46055.4016701624. The cubic root of 2121100023 is about 1284.8538086601.

Adding to 2121100023 its reverse (3200011212), we get a palindrome (5321111235).

The spelling of 2121100023 in words is "two billion, one hundred twenty-one million, one hundred thousand, twenty-three".