121142402 has 4 divisors (see below), whose sum is σ = 181713606. Its totient is φ = 60571200.

The previous prime is 121142383. The next prime is 121142419. The reversal of 121142402 is 204241121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 119268241 + 1874161 = 10921^2 + 1369^2 .

It is a super-3 number, since 3×121142402³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30285599 + ... + 30285602.

Almost surely, 2^121142402 is an apocalyptic number.

121142402 is a deficient number, since it is larger than the sum of its proper divisors (60571204).

121142402 is an equidigital number, since it uses as much as digits as its factorization.

121142402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60571203.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 121142402 is about 11006.4709148755. The cubic root of 121142402 is about 494.8026993167.

Adding to 121142402 its reverse (204241121), we get a palindrome (325383523).

The spelling of 121142402 in words is "one hundred twenty-one million, one hundred forty-two thousand, four hundred two".