11221221021000 has 64 divisors (see below), whose sum is σ = 35010209594880. Its totient is φ = 2992325604800.

The previous prime is 11221221020983. The next prime is 11221221021011. The reversal of 11221221021000 is 12012212211.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 1870200504 + ... + 1870206503.

It is an arithmetic number, because the mean of its divisors is an integer number (547034524920).

Almost surely, 2^{11221221021000} is an apocalyptic number.

11221221021000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221221021000 is an abundant number, since it is smaller than the sum of its proper divisors (23788988573880).

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

11221221021000 is a wasteful number, since it uses less digits than its factorization.

11221221021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3740407031 (or 3740407017 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11221221021000 its reverse (12012212211), we get a palindrome (11233233233211).

The spelling of 11221221021000 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, twenty-one thousand".