121115642 has 4 divisors (see below), whose sum is σ = 181673466. Its totient is φ = 60557820.

The previous prime is 121115641. The next prime is 121115647. The reversal of 121115642 is 246511121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246511121 = 487 ⋅506183.

It can be written as a sum of positive squares in only one way, i.e., 120978001 + 137641 = 10999^2 + 371^2 .

It is not an unprimeable number, because it can be changed into a prime (121115641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30278909 + ... + 30278912.

Almost surely, 2^121115642 is an apocalyptic number.

121115642 is a deficient number, since it is larger than the sum of its proper divisors (60557824).

121115642 is an equidigital number, since it uses as much as digits as its factorization.

121115642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60557823.

The product of its digits is 480, while the sum is 23.

The square root of 121115642 is about 11005.2551992219. The cubic root of 121115642 is about 494.7662631471.

Adding to 121115642 its reverse (246511121), we get a palindrome (367626763).

The spelling of 121115642 in words is "one hundred twenty-one million, one hundred fifteen thousand, six hundred forty-two".