12212112112021 has 8 divisors (see below), whose sum is σ = 12232499295744. Its totient is φ = 12191733380400.

The previous prime is 12212112111973. The next prime is 12212112112069. The reversal of 12212112112021 is 12021121121221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12212112111973) and next prime (12212112112069).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12212112112021 - 2¹⁷ = 12212111980949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12212112112021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212112110021) 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, 782416 + ... + 5003638.

It is an arithmetic number, because the mean of its divisors is an integer number (1529062411968).

Almost surely, 2^{12212112112021} is an apocalyptic number.

It is an amenable number.

12212112112021 is a deficient number, since it is larger than the sum of its proper divisors (20387183723).

12212112112021 is an equidigital number, since it uses as much as digits as its factorization.

12212112112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4226051.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12212112112021 its reverse (12021121121221), we get a palindrome (24233233233242).

The spelling of 12212112112021 in words is "twelve trillion, two hundred twelve billion, one hundred twelve million, one hundred twelve thousand, twenty-one".