221000200120 has 96 divisors (see below), whose sum is σ = 599770504800. Its totient is φ = 71783490816.

The previous prime is 221000200111. The next prime is 221000200181. The reversal of 221000200120 is 21002000122.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 221000200097 and 221000200106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 992115 + ... + 1194274.

It is an arithmetic number, because the mean of its divisors is an integer number (6247609425).

Almost surely, 2^221000200120 is an apocalyptic number.

221000200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221000200120 is an abundant number, since it is smaller than the sum of its proper divisors (378770304680).

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

221000200120 is a wasteful number, since it uses less digits than its factorization.

221000200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186445 (or 2186422 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 221000200120 its reverse (21002000122), we get a palindrome (242002200242).

The spelling of 221000200120 in words is "two hundred twenty-one billion, two hundred thousand, one hundred twenty".