122198981 has 8 divisors (see below), whose sum is σ = 123236160. Its totient is φ = 121165632.

The previous prime is 122198957. The next prime is 122199001. The reversal of 122198981 is 189891221.

It is a happy number.

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-122198981 is a prime.

It is a super-2 number, since 2×122198981² = 29865181914876722, which contains 22 as substring.

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 (122198581) 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, 120605 + ... + 121613.

It is an arithmetic number, because the mean of its divisors is an integer number (15404520).

Almost surely, 2^122198981 is an apocalyptic number.

It is an amenable number.

122198981 is a deficient number, since it is larger than the sum of its proper divisors (1037179).

122198981 is a wasteful number, since it uses less digits than its factorization.

122198981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915.

The product of its digits is 20736, while the sum is 41.

The square root of 122198981 is about 11054.3647940531. The cubic root of 122198981 is about 496.2370596020.

The spelling of 122198981 in words is "one hundred twenty-two million, one hundred ninety-eight thousand, nine hundred eighty-one".