221012102011220 has 96 divisors (see below), whose sum is σ = 500278579032960. Its totient is φ = 81530828398080.

The previous prime is 221012102011199. The next prime is 221012102011243. The reversal of 221012102011220 is 22110201210122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1645114811 + ... + 1645249149.

It is an arithmetic number, because the mean of its divisors is an integer number (5211235198260).

Almost surely, 2^{221012102011220} is an apocalyptic number.

221012102011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221012102011220 is an abundant number, since it is smaller than the sum of its proper divisors (279266477021740).

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

221012102011220 is a wasteful number, since it uses less digits than its factorization.

221012102011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140025 (or 140023 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221012102011220 its reverse (22110201210122), we get a palindrome (243122303221342).

The spelling of 221012102011220 in words is "two hundred twenty-one trillion, twelve billion, one hundred two million, eleven thousand, two hundred twenty".