12210121011 has 12 divisors (see below), whose sum is σ = 17894723336. Its totient is φ = 7400073120.

The previous prime is 12210120997. The next prime is 12210121013. The reversal of 12210121011 is 11012101221.

It is not a de Polignac number, because 12210121011 - 2¹⁵ = 12210088243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12210121013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16817986 + ... + 16818711.

Almost surely, 2^12210121011 is an apocalyptic number.

12210121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12210121011 is a deficient number, since it is larger than the sum of its proper divisors (5684602325).

12210121011 is a wasteful number, since it uses less digits than its factorization.

12210121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33636722 (or 33636711 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12210121011 its reverse (11012101221), we get a palindrome (23222222232).

It can be divided in two parts, 122101210 and 11, that added together give a palindrome (122101221).

The spelling of 12210121011 in words is "twelve billion, two hundred ten million, one hundred twenty-one thousand, eleven".