1222100401 has 4 divisors (see below), whose sum is σ = 1224550000. Its totient is φ = 1219650804.

The previous prime is 1222100359. The next prime is 1222100419. The reversal of 1222100401 is 1040012221.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-1222100401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222100701) 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, 1224051 + ... + 1225048.

It is an arithmetic number, because the mean of its divisors is an integer number (306137500).

Almost surely, 2^1222100401 is an apocalyptic number.

It is an amenable number.

1222100401 is a deficient number, since it is larger than the sum of its proper divisors (2449599).

1222100401 is an equidigital number, since it uses as much as digits as its factorization.

1222100401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449598.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1222100401 is about 34958.5526159193. The cubic root of 1222100401 is about 1069.1425864772.

Adding to 1222100401 its reverse (1040012221), we get a palindrome (2262112622).

The spelling of 1222100401 in words is "one billion, two hundred twenty-two million, one hundred thousand, four hundred one".