1001022201 has 12 divisors (see below), whose sum is σ = 1522022320. Its totient is φ = 632224440.

The previous prime is 1001022173. The next prime is 1001022229. The reversal of 1001022201 is 1022201001.

It is an interprime number because it is at equal distance from previous prime (1001022173) and next prime (1001022229).

It is not a de Polignac number, because 1001022201 - 2⁷ = 1001022073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001022251) 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, 2926795 + ... + 2927136.

Almost surely, 2^1001022201 is an apocalyptic number.

It is an amenable number.

1001022201 is a deficient number, since it is larger than the sum of its proper divisors (521000119).

1001022201 is a wasteful number, since it uses less digits than its factorization.

1001022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5853956 (or 5853953 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1001022201 is about 31638.9348904163. The cubic root of 1001022201 is about 1000.3406176331.

Adding to 1001022201 its reverse (1022201001), we get a palindrome (2023223202).

The spelling of 1001022201 in words is "one billion, one million, twenty-two thousand, two hundred one".