212221221023 has 16 divisors (see below), whose sum is σ = 250470124800. Its totient is φ = 179712266328.

The previous prime is 212221221013. The next prime is 212221221151. The reversal of 212221221023 is 320122122212.

It is not a de Polignac number, because 212221221023 - 2¹⁴ = 212221204639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212221220986 and 212221221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221221013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3698765 + ... + 3755702.

It is an arithmetic number, because the mean of its divisors is an integer number (15654382800).

Almost surely, 2^212221221023 is an apocalyptic number.

212221221023 is a deficient number, since it is larger than the sum of its proper divisors (38248903777).

212221221023 is an frugal number, since it uses more digits than its factorization.

212221221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7454571 (or 7454557 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 212221221023 its reverse (320122122212), we get a palindrome (532343343235).

The spelling of 212221221023 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty-three".