1200022101 has 16 divisors (see below), whose sum is σ = 1779633600. Its totient is φ = 799194384.

The previous prime is 1200022099. The next prime is 1200022177. The reversal of 1200022101 is 1012200021.

It is not a de Polignac number, because 1200022101 - 2¹ = 1200022099 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200021101) 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, 4630 + ... + 49208.

It is an arithmetic number, because the mean of its divisors is an integer number (111227100).

Almost surely, 2^1200022101 is an apocalyptic number.

It is an amenable number.

1200022101 is a deficient number, since it is larger than the sum of its proper divisors (579611499).

1200022101 is an equidigital number, since it uses as much as digits as its factorization.

1200022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45585 (or 45579 counting only the distinct ones).

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

The square root of 1200022101 is about 34641.3351503662. The cubic root of 1200022101 is about 1062.6650929806.

Adding to 1200022101 its reverse (1012200021), we get a palindrome (2212222122).

The spelling of 1200022101 in words is "one billion, two hundred million, twenty-two thousand, one hundred one".