1201001022 has 48 divisors (see below), whose sum is σ = 2828105280. Its totient is φ = 366140736.

The previous prime is 1201001017. The next prime is 1201001029. The reversal of 1201001022 is 2201001021.

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

It is a junction number, because it is equal to n+sod(n) for n = 1201000995 and 1201001013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201001029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1963 + ... + 49049.

It is an arithmetic number, because the mean of its divisors is an integer number (58918860).

Almost surely, 2^1201001022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201001022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1414052640).

1201001022 is an abundant number, since it is smaller than the sum of its proper divisors (1627104258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201001022 is a wasteful number, since it uses less digits than its factorization.

1201001022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47217 (or 47214 counting only the distinct ones).

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

The square root of 1201001022 is about 34655.4616474806. The cubic root of 1201001022 is about 1062.9539716706.

Adding to 1201001022 its reverse (2201001021), we get a palindrome (3402002043).

Subtracting 1201001022 from its reverse (2201001021), we obtain a palindrome (999999999).

The spelling of 1201001022 in words is "one billion, two hundred one million, one thousand, twenty-two".