1000122201 has 16 divisors (see below), whose sum is σ = 1595637120. Its totient is φ = 615459600.

The previous prime is 1000122191. The next prime is 1000122239. The reversal of 1000122201 is 1022210001.

It is not a de Polignac number, because 1000122201 - 2¹¹ = 1000120153 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1000122701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1424325 + ... + 1425026.

It is an arithmetic number, because the mean of its divisors is an integer number (99727320).

Almost surely, 2^1000122201 is an apocalyptic number.

It is an amenable number.

1000122201 is a deficient number, since it is larger than the sum of its proper divisors (595514919).

1000122201 is a wasteful number, since it uses less digits than its factorization.

1000122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2849373 (or 2849367 counting only the distinct ones).

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

The square root of 1000122201 is about 31624.7087101210. The cubic root of 1000122201 is about 1000.0407320075.

Adding to 1000122201 its reverse (1022210001), we get a palindrome (2022332202).

It can be divided in two parts, 1000 and 122201, that added together give a square (123201 = 351²).

The spelling of 1000122201 in words is "one billion, one hundred twenty-two thousand, two hundred one".