10212122221 has 8 divisors (see below), whose sum is σ = 11786552064. Its totient is φ = 8666581200.

The previous prime is 10212122131. The next prime is 10212122227. The reversal of 10212122221 is 12222121201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 10212122221 - 2⁷ = 10212122093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10212122195 and 10212122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212122227) 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, 7221445 + ... + 7222858.

It is an arithmetic number, because the mean of its divisors is an integer number (1473319008).

Almost surely, 2^10212122221 is an apocalyptic number.

It is an amenable number.

10212122221 is a deficient number, since it is larger than the sum of its proper divisors (1574429843).

10212122221 is a wasteful number, since it uses less digits than its factorization.

10212122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14444411.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 10212122221 its reverse (12222121201), we get a palindrome (22434243422).

The spelling of 10212122221 in words is "ten billion, two hundred twelve million, one hundred twenty-two thousand, two hundred twenty-one".