12212211021 has 16 divisors (see below), whose sum is σ = 16811440128. Its totient is φ = 7877329200.

The previous prime is 12212211017. The next prime is 12212211029. The reversal of 12212211021 is 12011221221.

It is not a de Polignac number, because 12212211021 - 2² = 12212211017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212211029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670566 + ... + 688536.

It is an arithmetic number, because the mean of its divisors is an integer number (1050715008).

Almost surely, 2^12212211021 is an apocalyptic number.

It is an amenable number.

12212211021 is a deficient number, since it is larger than the sum of its proper divisors (4599229107).

12212211021 is a wasteful number, since it uses less digits than its factorization.

12212211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25312.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12212211021 its reverse (12011221221), we get a palindrome (24223432242).

The spelling of 12212211021 in words is "twelve billion, two hundred twelve million, two hundred eleven thousand, twenty-one".