121422402 has 80 divisors (see below), whose sum is σ = 283026744. Its totient is φ = 38880000.

The previous prime is 121422401. The next prime is 121422409. The reversal of 121422402 is 204224121.

It can be written as a sum of positive squares in 4 ways, for example, as 68409441 + 53012961 = 8271^2 + 7281^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121422401) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 670752 + ... + 670932.

Almost surely, 2^121422402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121422402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141513372).

121422402 is an abundant number, since it is smaller than the sum of its proper divisors (161604342).

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

121422402 is a wasteful number, since it uses less digits than its factorization.

121422402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 121422402 is about 11019.1833635710. The cubic root of 121422402 is about 495.1836233354.

Adding to 121422402 its reverse (204224121), we get a palindrome (325646523).

The spelling of 121422402 in words is "one hundred twenty-one million, four hundred twenty-two thousand, four hundred two".