1222872001 has 12 divisors (see below), whose sum is σ = 1333865772. Its totient is φ = 1120544256.

The previous prime is 1222871989. The next prime is 1222872023. The reversal of 1222872001 is 1002782221.

It can be written as a sum of positive squares in 6 ways, for example, as 544008976 + 678863025 = 23324^2 + 26055^2 .

It is not a de Polignac number, because 1222872001 - 2¹³ = 1222863809 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 (1222872401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3256 + ... + 49561.

It is an arithmetic number, because the mean of its divisors is an integer number (111155481).

Almost surely, 2^1222872001 is an apocalyptic number.

It is an amenable number.

1222872001 is a deficient number, since it is larger than the sum of its proper divisors (110993771).

1222872001 is a wasteful number, since it uses less digits than its factorization.

1222872001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52980 (or 52967 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 1222872001 is about 34969.5868005328. The cubic root of 1222872001 is about 1069.3675480442.

The spelling of 1222872001 in words is "one billion, two hundred twenty-two million, eight hundred seventy-two thousand, one".