212323101021 has 24 divisors (see below), whose sum is σ = 319716633600. Its totient is φ = 135626364000.

The previous prime is 212323100987. The next prime is 212323101079. The reversal of 212323101021 is 120101323212.

212323101021 is a `hidden beast` number, since 21 + 232 + 310 + 102 + 1 = 666.

It is not a de Polignac number, because 212323101021 - 2³⁰ = 211249359197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212323100985 and 212323101003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212323101821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3739221 + ... + 3795578.

It is an arithmetic number, because the mean of its divisors is an integer number (13321526400).

Almost surely, 2^212323101021 is an apocalyptic number.

It is an amenable number.

212323101021 is a deficient number, since it is larger than the sum of its proper divisors (107393532579).

212323101021 is a wasteful number, since it uses less digits than its factorization.

212323101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7534937 (or 7534934 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212323101021 its reverse (120101323212), we get a palindrome (332424424233).

The spelling of 212323101021 in words is "two hundred twelve billion, three hundred twenty-three million, one hundred one thousand, twenty-one".