121478914138844 has 6 divisors (see below), whose sum is σ = 212588099742984. Its totient is φ = 60739457069420.

The previous prime is 121478914138831. The next prime is 121478914138847. The reversal of 121478914138844 is 448831419874121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121478914138847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15184864267352 + ... + 15184864267359.

It is an arithmetic number, because the mean of its divisors is an integer number (35431349957164).

Almost surely, 2^{121478914138844} is an apocalyptic number.

It is an amenable number.

121478914138844 is a deficient number, since it is larger than the sum of its proper divisors (91109185604140).

121478914138844 is a wasteful number, since it uses less digits than its factorization.

121478914138844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30369728534715 (or 30369728534713 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 65.

The spelling of 121478914138844 in words is "one hundred twenty-one trillion, four hundred seventy-eight billion, nine hundred fourteen million, one hundred thirty-eight thousand, eight hundred forty-four".