121316487 has 4 divisors (see below), whose sum is σ = 161755320. Its totient is φ = 80877656.

The previous prime is 121316479. The next prime is 121316491. The reversal of 121316487 is 784613121.

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

It is a cyclic number.

It is not a de Polignac number, because 121316487 - 2³ = 121316479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121316407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20219412 + ... + 20219417.

It is an arithmetic number, because the mean of its divisors is an integer number (40438830).

Almost surely, 2^121316487 is an apocalyptic number.

121316487 is a deficient number, since it is larger than the sum of its proper divisors (40438833).

121316487 is an equidigital number, since it uses as much as digits as its factorization.

121316487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40438832.

The product of its digits is 8064, while the sum is 33.

The square root of 121316487 is about 11014.3763781705. The cubic root of 121316487 is about 495.0396009538.

The spelling of 121316487 in words is "one hundred twenty-one million, three hundred sixteen thousand, four hundred eighty-seven".