12211112001421 has 2 divisors, whose sum is σ = 12211112001422. Its totient is φ = 12211112001420.

The previous prime is 12211112001359. The next prime is 12211112001427. The reversal of 12211112001421 is 12410021111221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10332759520521 + 1878352480900 = 3214461^2 + 1370530^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211112001421 - 2¹³ = 12211111993229 is a prime.

It is a super-2 number, since 2×12211112001421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211112001427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105556000710 + 6105556000711.

It is an arithmetic number, because the mean of its divisors is an integer number (6105556000711).

Almost surely, 2^{12211112001421} is an apocalyptic number.

It is an amenable number.

12211112001421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211112001421 is an equidigital number, since it uses as much as digits as its factorization.

12211112001421 is an evil number, because the sum of its binary digits is even.

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

Adding to 12211112001421 its reverse (12410021111221), we get a palindrome (24621133112642).

The spelling of 12211112001421 in words is "twelve trillion, two hundred eleven billion, one hundred twelve million, one thousand, four hundred twenty-one".