1225511100522 has 96 divisors (see below), whose sum is σ = 2965920796800. Its totient is φ = 363440784384.

The previous prime is 1225511100469. The next prime is 1225511100523. The reversal of 1225511100522 is 2250011155221.

1225511100522 is a `hidden beast` number, since 1 + 2 + 2 + 551 + 1 + 100 + 5 + 2 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1225511100523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2426379 + ... + 2887617.

It is an arithmetic number, because the mean of its divisors is an integer number (30895008300).

Almost surely, 2^{1225511100522} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225511100522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1482960398400).

1225511100522 is an abundant number, since it is smaller than the sum of its proper divisors (1740409696278).

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

1225511100522 is a wasteful number, since it uses less digits than its factorization.

1225511100522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461740 (or 461737 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

Adding to 1225511100522 its reverse (2250011155221), we get a palindrome (3475522255743).

The spelling of 1225511100522 in words is "one trillion, two hundred twenty-five billion, five hundred eleven million, one hundred thousand, five hundred twenty-two".