11221220201000 has 32 divisors (see below), whose sum is σ = 26257655272680. Its totient is φ = 4488488080000.

The previous prime is 11221220200973. The next prime is 11221220201053. The reversal of 11221220201000 is 10202212211.

It can be written as a sum of positive squares in 4 ways, for example, as 2580218965636 + 8641001235364 = 1606306^2 + 2939558^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5610609101 + ... + 5610611100.

Almost surely, 2^{11221220201000} is an apocalyptic number.

11221220201000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221220201000 is an abundant number, since it is smaller than the sum of its proper divisors (15036435071680).

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

11221220201000 is a wasteful number, since it uses less digits than its factorization.

11221220201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11221220222 (or 11221220208 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 11221220201000 its reverse (10202212211), we get a palindrome (11231422413211).

The spelling of 11221220201000 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, two hundred one thousand".