2201221221000 has 64 divisors (see below), whose sum is σ = 6867810218880. Its totient is φ = 586992324800.

The previous prime is 2201221220999. The next prime is 2201221221113. The reversal of 2201221221000 is 1221221022.

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, 366867204 + ... + 366873203.

It is an arithmetic number, because the mean of its divisors is an integer number (107309534670).

Almost surely, 2^{2201221221000} is an apocalyptic number.

2201221221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2201221221000 is an abundant number, since it is smaller than the sum of its proper divisors (4666588997880).

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

2201221221000 is a wasteful number, since it uses less digits than its factorization.

2201221221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733740431 (or 733740417 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2201221221000 its reverse (1221221022), we get a palindrome (2202442442022).

The spelling of 2201221221000 in words is "two trillion, two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand".