121091267918 has 4 divisors (see below), whose sum is σ = 181636901880. Its totient is φ = 60545633958.

The previous prime is 121091267917. The next prime is 121091267929. The reversal of 121091267918 is 819762190121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121091267917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30272816978 + ... + 30272816981.

It is an arithmetic number, because the mean of its divisors is an integer number (45409225470).

Almost surely, 2^121091267918 is an apocalyptic number.

121091267918 is a deficient number, since it is larger than the sum of its proper divisors (60545633962).

121091267918 is an equidigital number, since it uses as much as digits as its factorization.

121091267918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60545633961.

The product of its (nonzero) digits is 108864, while the sum is 47.

The spelling of 121091267918 in words is "one hundred twenty-one billion, ninety-one million, two hundred sixty-seven thousand, nine hundred eighteen".