221012200120 has 32 divisors (see below), whose sum is σ = 497409728400. Its totient is φ = 88381363968.

The previous prime is 221012200117. The next prime is 221012200127. The reversal of 221012200120 is 21002210122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221012200120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012200127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582234 + ... + 883753.

Almost surely, 2^221012200120 is an apocalyptic number.

221012200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221012200120 is an abundant number, since it is smaller than the sum of its proper divisors (276397528280).

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

221012200120 is a wasteful number, since it uses less digits than its factorization.

221012200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469767 (or 1469763 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221012200120 its reverse (21002210122), we get a palindrome (242014410242).

The spelling of 221012200120 in words is "two hundred twenty-one billion, twelve million, two hundred thousand, one hundred twenty".