12211121002 has 16 divisors (see below), whose sum is σ = 18952149960. Its totient is φ = 5893823488.

The previous prime is 12211120991. The next prime is 12211121003. The reversal of 12211121002 is 20012111221.

It can be written as a sum of positive squares in 4 ways, for example, as 7833843081 + 4377277921 = 88509^2 + 66161^2 .

It is a super-2 number, since 2×12211121002² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12211121003) 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, 309498 + ... + 346714.

Almost surely, 2^12211121002 is an apocalyptic number.

12211121002 is a deficient number, since it is larger than the sum of its proper divisors (6741028958).

12211121002 is a wasteful number, since it uses less digits than its factorization.

12211121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42905.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12211121002 its reverse (20012111221), we get a palindrome (32223232223).

The spelling of 12211121002 in words is "twelve billion, two hundred eleven million, one hundred twenty-one thousand, two".