12220212053421 has 8 divisors (see below), whose sum is σ = 18104017856960. Its totient is φ = 8146808035596.

The previous prime is 12220212053419. The next prime is 12220212053437. The reversal of 12220212053421 is 12435021202221.

12220212053421 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 0 + 2 + 120 + 534 + 2 + 1 = 666.

It is not a de Polignac number, because 12220212053421 - 2¹ = 12220212053419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 452600446423 = 12220212053421 / (1 + 2 + 2 + 2 + 0 + 2 + 1 + 2 + 0 + 5 + 3 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220212053411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226300223185 + ... + 226300223238.

It is an arithmetic number, because the mean of its divisors is an integer number (2263002232120).

Almost surely, 2^{12220212053421} is an apocalyptic number.

It is an amenable number.

12220212053421 is a deficient number, since it is larger than the sum of its proper divisors (5883805803539).

12220212053421 is an equidigital number, since it uses as much as digits as its factorization.

12220212053421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452600446432 (or 452600446426 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 12220212053421 its reverse (12435021202221), we get a palindrome (24655233255642).

The spelling of 12220212053421 in words is "twelve trillion, two hundred twenty billion, two hundred twelve million, fifty-three thousand, four hundred twenty-one".