109951221 has 8 divisors (see below), whose sum is σ = 148789984. Its totient is φ = 72206640.

The previous prime is 109951211. The next prime is 109951241. The reversal of 109951221 is 122159901.

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

It is not a de Polignac number, because 109951221 - 2¹⁴ = 109934837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109951211) 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, 273310 + ... + 273711.

It is an arithmetic number, because the mean of its divisors is an integer number (18598748).

Almost surely, 2^109951221 is an apocalyptic number.

It is an amenable number.

109951221 is a deficient number, since it is larger than the sum of its proper divisors (38838763).

109951221 is an equidigital number, since it uses as much as digits as its factorization.

109951221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547091.

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 109951221 is about 10485.7627762600. The cubic root of 109951221 is about 479.0711507896.

The spelling of 109951221 in words is "one hundred nine million, nine hundred fifty-one thousand, two hundred twenty-one".