121399362 has 90 divisors (see below), whose sum is σ = 312751257. Its totient is φ = 34031088.

The previous prime is 121399357. The next prime is 121399367. The reversal of 121399362 is 263993121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121399357) and next prime (121399367).

It can be written as a sum of positive squares in 2 ways, for example, as 115154361 + 6245001 = 10731^2 + 2499^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=7791.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (121399367) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2290528 + ... + 2290580.

Almost surely, 2^121399362 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121399362

121399362 is an abundant number, since it is smaller than the sum of its proper divisors (191351895).

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

121399362 is an frugal number, since it uses more digits than its factorization.

121399362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 65 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 121399362 is about 11018.1378644488. The cubic root of 121399362 is about 495.1523008551.

The spelling of 121399362 in words is "one hundred twenty-one million, three hundred ninety-nine thousand, three hundred sixty-two".