12220400402221 has 8 divisors (see below), whose sum is σ = 13364926114464. Its totient is φ = 11081471393520.

The previous prime is 12220400402201. The next prime is 12220400402257.

12220400402221 is nontrivially palindromic in base 10.

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

It is a de Polignac number, because none of the positive numbers 2^k-12220400402221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12220400402192 and 12220400402201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220400402201) 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, 1399171315 + ... + 1399180048.

It is an arithmetic number, because the mean of its divisors is an integer number (1670615764308).

Almost surely, 2^{12220400402221} is an apocalyptic number.

12220400402221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12220400402221 is a deficient number, since it is larger than the sum of its proper divisors (1144525712243).

12220400402221 is a wasteful number, since it uses less digits than its factorization.

12220400402221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798351771.

The product of its (nonzero) digits is 1024, while the sum is 22.

Multiplying 12220400402221 by its sum of digits (22), we get a palindrome (268848808848862).

It can be divided in two parts, 12220400 and 402221, that added together give a palindrome (12622621).

The spelling of 12220400402221 in words is "twelve trillion, two hundred twenty billion, four hundred million, four hundred two thousand, two hundred twenty-one".