1001111022 has 64 divisors (see below), whose sum is σ = 2290821120. Its totient is φ = 323870400.

The previous prime is 1001110991. The next prime is 1001111047. The reversal of 1001111022 is 2201111001.

It is a happy number.

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 = 1001110995 and 1001111013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 466083 + ... + 468225.

It is an arithmetic number, because the mean of its divisors is an integer number (35794080).

Almost surely, 2^1001111022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1001111022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1145410560).

1001111022 is an abundant number, since it is smaller than the sum of its proper divisors (1289710098).

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

1001111022 is a wasteful number, since it uses less digits than its factorization.

1001111022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406 (or 2400 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1001111022 is about 31640.3385253698. The cubic root of 1001111022 is about 1000.3702035990.

Adding to 1001111022 its reverse (2201111001), we get a palindrome (3202222023).

The spelling of 1001111022 in words is "one billion, one million, one hundred eleven thousand, twenty-two".