1222640001 has 20 divisors (see below), whose sum is σ = 1992451824. Its totient is φ = 740993400.

The previous prime is 1222639997. The next prime is 1222640011. The reversal of 1222640001 is 1000462221.

1222640001 is a `hidden beast` number, since 1 + 2 + 22 + 640 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 1222640001 - 2² = 1222639997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1222640011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 685215 + ... + 686996.

Almost surely, 2^1222640001 is an apocalyptic number.

1222640001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222640001 is a deficient number, since it is larger than the sum of its proper divisors (769811823).

1222640001 is a wasteful number, since it uses less digits than its factorization.

1222640001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372234 (or 1372225 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1222640001 is about 34966.2694750241. The cubic root of 1222640001 is about 1069.2999179184.

The spelling of 1222640001 in words is "one billion, two hundred twenty-two million, six hundred forty thousand, one".