211121102023 has 4 divisors (see below), whose sum is σ = 227361186808. Its totient is φ = 194881017240.

The previous prime is 211121102009. The next prime is 211121102039. The reversal of 211121102023 is 320201121112.

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

It is not a de Polignac number, because 211121102023 - 2²⁵ = 211087547591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211121101988 and 211121102006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121102063) 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, 8120042373 + ... + 8120042398.

It is an arithmetic number, because the mean of its divisors is an integer number (56840296702).

Almost surely, 2^211121102023 is an apocalyptic number.

211121102023 is a deficient number, since it is larger than the sum of its proper divisors (16240084785).

211121102023 is a wasteful number, since it uses less digits than its factorization.

211121102023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16240084784.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 211121102023 its reverse (320201121112), we get a palindrome (531322223135).

The spelling of 211121102023 in words is "two hundred eleven billion, one hundred twenty-one million, one hundred two thousand, twenty-three".