1201002200040 has 128 divisors (see below), whose sum is σ = 3716269839360. Its totient is φ = 310273726464.

The previous prime is 1201002200023. The next prime is 1201002200113. The reversal of 1201002200040 is 400022001021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1201002199989 and 1201002200025.

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, 454057 + ... + 1614983.

It is an arithmetic number, because the mean of its divisors is an integer number (29033358120).

Almost surely, 2^{1201002200040} is an apocalyptic number.

1201002200040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201002200040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1858134919680).

1201002200040 is an abundant number, since it is smaller than the sum of its proper divisors (2515267639320).

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

1201002200040 is a wasteful number, since it uses less digits than its factorization.

1201002200040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161211 (or 1161207 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1201002200040 its reverse (400022001021), we get a palindrome (1601024201061).

The spelling of 1201002200040 in words is "one trillion, two hundred one billion, two million, two hundred thousand, forty".