11220121002000 has 80 divisors (see below), whose sum is σ = 36173670129792. Its totient is φ = 2992032265600.

The previous prime is 11220121001983. The next prime is 11220121002017. The reversal of 11220121002000 is 20012102211.

It is an interprime number because it is at equal distance from previous prime (11220121001983) and next prime (11220121002017).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×11220121002000² (a number of 27 digits) contains 22 as substring.

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

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, 935004084 + ... + 935016083.

Almost surely, 2^{11220121002000} is an apocalyptic number.

11220121002000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11220121002000 is an abundant number, since it is smaller than the sum of its proper divisors (24953549127792).

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

11220121002000 is a wasteful number, since it uses less digits than its factorization.

11220121002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870020193 (or 1870020177 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11220121002000 its reverse (20012102211), we get a palindrome (11240133104211).

The spelling of 11220121002000 in words is "eleven trillion, two hundred twenty billion, one hundred twenty-one million, two thousand".