12111220210 has 16 divisors (see below), whose sum is σ = 21939053976. Its totient is φ = 4813630848.

The previous prime is 12111220181. The next prime is 12111220229. The reversal of 12111220210 is 1202211121.

It can be written as a sum of positive squares in 4 ways, for example, as 9358434121 + 2752786089 = 96739^2 + 52467^2 .

It is a super-2 number, since 2×12111220210² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3855507 + ... + 3858646.

Almost surely, 2^12111220210 is an apocalyptic number.

12111220210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111220210 is a deficient number, since it is larger than the sum of its proper divisors (9827833766).

12111220210 is a wasteful number, since it uses less digits than its factorization.

12111220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7714317.

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

Adding to 12111220210 its reverse (1202211121), we get a palindrome (13313431331).

The spelling of 12111220210 in words is "twelve billion, one hundred eleven million, two hundred twenty thousand, two hundred ten".