1000001200122 has 64 divisors (see below), whose sum is σ = 2229752371200. Its totient is φ = 332205358320.

The previous prime is 1000001200111. The next prime is 1000001200151. The reversal of 1000001200122 is 2210021000001.

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

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, 58242783 + ... + 58259949.

It is an arithmetic number, because the mean of its divisors is an integer number (34839880800).

Almost surely, 2^{1000001200122} is an apocalyptic number.

1000001200122 is an abundant number, since it is smaller than the sum of its proper divisors (1229751171078).

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

1000001200122 is a wasteful number, since it uses less digits than its factorization.

1000001200122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20768 (or 20762 counting only the distinct ones).

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

Adding to 1000001200122 its reverse (2210021000001), we get a palindrome (3210022200123).

The spelling of 1000001200122 in words is "one trillion, one million, two hundred thousand, one hundred twenty-two".