121220051412542 has 4 divisors (see below), whose sum is σ = 181830077118816. Its totient is φ = 60610025706270.

The previous prime is 121220051412539. The next prime is 121220051412553. The reversal of 121220051412542 is 245214150022121.

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

It is a junction number, because it is equal to n+sod(n) for n = 121220051412499 and 121220051412508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30305012853134 + ... + 30305012853137.

It is an arithmetic number, because the mean of its divisors is an integer number (45457519279704).

Almost surely, 2^{121220051412542} is an apocalyptic number.

121220051412542 is a deficient number, since it is larger than the sum of its proper divisors (60610025706274).

121220051412542 is an equidigital number, since it uses as much as digits as its factorization.

121220051412542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60610025706273.

The product of its (nonzero) digits is 12800, while the sum is 32.

The spelling of 121220051412542 in words is "one hundred twenty-one trillion, two hundred twenty billion, fifty-one million, four hundred twelve thousand, five hundred forty-two".