221012022109 has 8 divisors (see below), whose sum is σ = 225310610232. Its totient is φ = 216718195200.

The previous prime is 221012022031. The next prime is 221012022137. The reversal of 221012022109 is 901220210122.

It can be written as a sum of positive squares in 4 ways, for example, as 7119646884 + 213892375225 = 84378^2 + 462485^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221012022109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221012022109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012022149) 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, 1096492 + ... + 1282309.

It is an arithmetic number, because the mean of its divisors is an integer number (28163826279).

Almost surely, 2^221012022109 is an apocalyptic number.

It is an amenable number.

221012022109 is a deficient number, since it is larger than the sum of its proper divisors (4298588123).

221012022109 is a wasteful number, since it uses less digits than its factorization.

221012022109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380607.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 221012022109 in words is "two hundred twenty-one billion, twelve million, twenty-two thousand, one hundred nine".