1000022201 has 4 divisors (see below), whose sum is σ = 1001277732. Its totient is φ = 998766672.

The previous prime is 1000022197. The next prime is 1000022213. The reversal of 1000022201 is 1022200001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 537126976 + 462895225 = 23176^2 + 21515^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000022201 - 2² = 1000022197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000027201) 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, 626570 + ... + 628163.

It is an arithmetic number, because the mean of its divisors is an integer number (250319433).

Almost surely, 2^1000022201 is an apocalyptic number.

It is an amenable number.

1000022201 is a deficient number, since it is larger than the sum of its proper divisors (1255531).

1000022201 is an equidigital number, since it uses as much as digits as its factorization.

1000022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255530.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1000022201 is about 31623.1276283672. The cubic root of 1000022201 is about 1000.0074002786.

Adding to 1000022201 its reverse (1022200001), we get a palindrome (2022222202).

It can be divided in two parts, 10000 and 22201, that multiplied together give a square (222010000 = 14900²).

The spelling of 1000022201 in words is "one billion, twenty-two thousand, two hundred one".