10221221222 has 4 divisors (see below), whose sum is σ = 15331831836. Its totient is φ = 5110610610.

The previous prime is 10221221201. The next prime is 10221221233. The reversal of 10221221222 is 22212212201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22212212201 = 1433 ⋅15500497.

It is a super-3 number, since 3×10221221222³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10221221222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2555305304 + ... + 2555305307.

It is an arithmetic number, because the mean of its divisors is an integer number (3832957959).

Almost surely, 2^10221221222 is an apocalyptic number.

10221221222 is a deficient number, since it is larger than the sum of its proper divisors (5110610614).

10221221222 is an equidigital number, since it uses as much as digits as its factorization.

10221221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110610613.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 10221221222 its reverse (22212212201), we get a palindrome (32433433423).

The spelling of 10221221222 in words is "ten billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".