1200100100022 has 24 divisors (see below), whose sum is σ = 2600641232280. Its totient is φ = 399968082240.

The previous prime is 1200100099973. The next prime is 1200100100041. The reversal of 1200100100022 is 2200010010021.

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 = 1200100099977 and 1200100100013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5326947 + ... + 5547662.

It is an arithmetic number, because the mean of its divisors is an integer number (108360051345).

Almost surely, 2^{1200100100022} is an apocalyptic number.

1200100100022 is an abundant number, since it is smaller than the sum of its proper divisors (1400541132258).

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

1200100100022 is a wasteful number, since it uses less digits than its factorization.

1200100100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10880748 (or 10880745 counting only the distinct ones).

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

Adding to 1200100100022 its reverse (2200010010021), we get a palindrome (3400110110043).

Subtracting 1200100100022 from its reverse (2200010010021), we obtain a palindrome (999909909999).

The spelling of 1200100100022 in words is "one trillion, two hundred billion, one hundred million, one hundred thousand, twenty-two".