1222100442421 has 4 divisors (see below), whose sum is σ = 1224437155072. Its totient is φ = 1219763729772.

The previous prime is 1222100442391. The next prime is 1222100442449. The reversal of 1222100442421 is 1242440012221.

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 1222100442421 - 2⁷ = 1222100442293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222100442221) 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, 1168355541 + ... + 1168356586.

It is an arithmetic number, because the mean of its divisors is an integer number (306109288768).

Almost surely, 2^{1222100442421} is an apocalyptic number.

It is an amenable number.

1222100442421 is a deficient number, since it is larger than the sum of its proper divisors (2336712651).

1222100442421 is an equidigital number, since it uses as much as digits as its factorization.

1222100442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336712650.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 1222100442421 its reverse (1242440012221), we get a palindrome (2464540454642).

The spelling of 1222100442421 in words is "one trillion, two hundred twenty-two billion, one hundred million, four hundred forty-two thousand, four hundred twenty-one".