211212023 has 4 divisors (see below), whose sum is σ = 230413128. Its totient is φ = 192010920.

The previous prime is 211212019. The next prime is 211212091. The reversal of 211212023 is 320212112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 211212023 - 2² = 211212019 is a prime.

It is a super-2 number, since 2×211212023² = 89221037319505058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211211989 and 211212007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212823) 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, 9600536 + ... + 9600557.

It is an arithmetic number, because the mean of its divisors is an integer number (57603282).

Almost surely, 2^211212023 is an apocalyptic number.

211212023 is a deficient number, since it is larger than the sum of its proper divisors (19201105).

211212023 is a wasteful number, since it uses less digits than its factorization.

211212023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19201104.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 211212023 is about 14533.1353465107. The cubic root of 211212023 is about 595.5335214148.

Adding to 211212023 its reverse (320212112), we get a palindrome (531424135).

The spelling of 211212023 in words is "two hundred eleven million, two hundred twelve thousand, twenty-three".