12212001111021 has 4 divisors (see below), whose sum is σ = 16282668148032. Its totient is φ = 8141334074012.

The previous prime is 12212001110983. The next prime is 12212001111053. The reversal of 12212001111021 is 12011110021221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12212001111021 - 2⁶ = 12212001110957 is a prime.

It is a super-2 number, since 2×12212001111021² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212001111091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035333518501 + ... + 2035333518506.

It is an arithmetic number, because the mean of its divisors is an integer number (4070667037008).

Almost surely, 2^{12212001111021} is an apocalyptic number.

It is an amenable number.

12212001111021 is a deficient number, since it is larger than the sum of its proper divisors (4070667037011).

12212001111021 is an equidigital number, since it uses as much as digits as its factorization.

12212001111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070667037010.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12212001111021 its reverse (12011110021221), we get a palindrome (24223111132242).

The spelling of 12212001111021 in words is "twelve trillion, two hundred twelve billion, one million, one hundred eleven thousand, twenty-one".