1222139001 has 4 divisors (see below), whose sum is σ = 1629518672. Its totient is φ = 814759332.

The previous prime is 1222138999. The next prime is 1222139021. The reversal of 1222139001 is 1009312221.

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 not a de Polignac number, because 1222139001 - 2¹ = 1222138999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222139021) 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, 203689831 + ... + 203689836.

It is an arithmetic number, because the mean of its divisors is an integer number (407379668).

Almost surely, 2^1222139001 is an apocalyptic number.

It is an amenable number.

1222139001 is a deficient number, since it is larger than the sum of its proper divisors (407379671).

1222139001 is an equidigital number, since it uses as much as digits as its factorization.

1222139001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407379670.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1222139001 is about 34959.1046939134. The cubic root of 1222139001 is about 1069.1538426362.

The spelling of 1222139001 in words is "one billion, two hundred twenty-two million, one hundred thirty-nine thousand, one".