10221220122212 has 18 divisors (see below), whose sum is σ = 19661065979814. Its totient is φ = 4646009146240.

The previous prime is 10221220122203. The next prime is 10221220122229. The reversal of 10221220122212 is 21222102212201.

It can be written as a sum of positive squares in only one way, i.e., 10191826391296 + 29393730916 = 3192464^2 + 171446^2 .

It is a super-2 number, since 2×10221220122212² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10559111213 + ... + 10559112180.

It is an arithmetic number, because the mean of its divisors is an integer number (1092281443323).

Almost surely, 2^{10221220122212} is an apocalyptic number.

It is an amenable number.

10221220122212 is a deficient number, since it is larger than the sum of its proper divisors (9439845857602).

10221220122212 is a wasteful number, since it uses less digits than its factorization.

10221220122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21118223419 (or 21118223406 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 10221220122212 its reverse (21222102212201), we get a palindrome (31443322334413).

The spelling of 10221220122212 in words is "ten trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, two hundred twelve".