91121222 has 8 divisors (see below), whose sum is σ = 136722936. Its totient is φ = 45546912.

The previous prime is 91121213. The next prime is 91121227. The reversal of 91121222 is 22212119.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 91121194 and 91121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91121227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7358 + ... + 15374.

It is an arithmetic number, because the mean of its divisors is an integer number (17090367).

Almost surely, 2^91121222 is an apocalyptic number.

91121222 is a deficient number, since it is larger than the sum of its proper divisors (45601714).

91121222 is a wasteful number, since it uses less digits than its factorization.

91121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13702.

The product of its digits is 144, while the sum is 20.

The square root of 91121222 is about 9545.7436588251. The cubic root of 91121222 is about 449.9937809840.

The spelling of 91121222 in words is "ninety-one million, one hundred twenty-one thousand, two hundred twenty-two".