121423402 has 4 divisors (see below), whose sum is σ = 182135106. Its totient is φ = 60711700.

The previous prime is 121423399. The next prime is 121423409. The reversal of 121423402 is 204324121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204324121 = 10733 ⋅19037.

It can be written as a sum of positive squares in only one way, i.e., 121418361 + 5041 = 11019^2 + 71^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121423402.

It is not an unprimeable number, because it can be changed into a prime (121423409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30355849 + ... + 30355852.

Almost surely, 2^121423402 is an apocalyptic number.

121423402 is a deficient number, since it is larger than the sum of its proper divisors (60711704).

121423402 is an equidigital number, since it uses as much as digits as its factorization.

121423402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60711703.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 121423402 is about 11019.2287388909. The cubic root of 121423402 is about 495.1849827283.

Adding to 121423402 its reverse (204324121), we get a palindrome (325747523).

The spelling of 121423402 in words is "one hundred twenty-one million, four hundred twenty-three thousand, four hundred two".