1210022001 has 12 divisors (see below), whose sum is σ = 1752088260. Its totient is φ = 804706560.

The previous prime is 1210021999. The next prime is 1210022027. The reversal of 1210022001 is 1002200121.

It can be written as a sum of positive squares in 2 ways, for example, as 802022400 + 407999601 = 28320^2 + 20199^2 .

It is not a de Polignac number, because 1210022001 - 2¹ = 1210021999 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 (1210092001) 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, 160680 + ... + 168041.

It is an arithmetic number, because the mean of its divisors is an integer number (146007355).

Almost surely, 2^1210022001 is an apocalyptic number.

It is an amenable number.

1210022001 is a deficient number, since it is larger than the sum of its proper divisors (542066259).

1210022001 is a wasteful number, since it uses less digits than its factorization.

1210022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329136 (or 329133 counting only the distinct ones).

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

The square root of 1210022001 is about 34785.3705025547. The cubic root of 1210022001 is about 1065.6086952164.

Adding to 1210022001 its reverse (1002200121), we get a palindrome (2212222122).

The spelling of 1210022001 in words is "one billion, two hundred ten million, twenty-two thousand, one".