11221001212120 has 64 divisors (see below), whose sum is σ = 29848968763200. Its totient is φ = 3714538329600.

The previous prime is 11221001212051. The next prime is 11221001212139. The reversal of 11221001212120 is 2121210012211.

It is a junction number, because it is equal to n+sod(n) for n = 11221001212094 and 11221001212103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 690940231 + ... + 690956470.

It is an arithmetic number, because the mean of its divisors is an integer number (466390136925).

Almost surely, 2^{11221001212120} is an apocalyptic number.

11221001212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221001212120 is an abundant number, since it is smaller than the sum of its proper divisors (18627967551080).

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

11221001212120 is a wasteful number, since it uses less digits than its factorization.

11221001212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381896748 (or 1381896744 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11221001212120 its reverse (2121210012211), we get a palindrome (13342211224331).

The spelling of 11221001212120 in words is "eleven trillion, two hundred twenty-one billion, one million, two hundred twelve thousand, one hundred twenty".