121490261758 has 4 divisors (see below), whose sum is σ = 182235392640. Its totient is φ = 60745130878.

The previous prime is 121490261707. The next prime is 121490261771. The reversal of 121490261758 is 857162094121.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30372565438 + ... + 30372565441.

It is an arithmetic number, because the mean of its divisors is an integer number (45558848160).

Almost surely, 2^121490261758 is an apocalyptic number.

121490261758 is a deficient number, since it is larger than the sum of its proper divisors (60745130882).

121490261758 is an equidigital number, since it uses as much as digits as its factorization.

121490261758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60745130881.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 121490261758 in words is "one hundred twenty-one billion, four hundred ninety million, two hundred sixty-one thousand, seven hundred fifty-eight".