1201122101 has 16 divisors (see below), whose sum is σ = 1248863616. Its totient is φ = 1154400000.

The previous prime is 1201122089. The next prime is 1201122211. The reversal of 1201122101 is 1012211021.

It is a cyclic number.

It is not a de Polignac number, because 1201122101 - 2³⁰ = 127380277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201122701) 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, 810281 + ... + 811761.

It is an arithmetic number, because the mean of its divisors is an integer number (78053976).

Almost surely, 2^1201122101 is an apocalyptic number.

It is an amenable number.

1201122101 is a deficient number, since it is larger than the sum of its proper divisors (47741515).

1201122101 is a wasteful number, since it uses less digits than its factorization.

1201122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1201122101 is about 34657.2084998201. The cubic root of 1201122101 is about 1062.9896910626.

Adding to 1201122101 its reverse (1012211021), we get a palindrome (2213333122).

The spelling of 1201122101 in words is "one billion, two hundred one million, one hundred twenty-two thousand, one hundred one".