121973957458 has 8 divisors (see below), whose sum is σ = 193723344252. Its totient is φ = 57399509376.

The previous prime is 121973957431. The next prime is 121973957461. The reversal of 121973957458 is 854759379121.

It can be written as a sum of positive squares in 2 ways, for example, as 120168302409 + 1805655049 = 346653^2 + 42493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 121973957396 and 121973957405.

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 in 3 ways as a sum of consecutive naturals, for example, 1793734635 + ... + 1793734702.

Almost surely, 2^121973957458 is an apocalyptic number.

121973957458 is a deficient number, since it is larger than the sum of its proper divisors (71749386794).

121973957458 is a wasteful number, since it uses less digits than its factorization.

121973957458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3587469356.

The product of its digits is 19051200, while the sum is 61.

The spelling of 121973957458 in words is "one hundred twenty-one billion, nine hundred seventy-three million, nine hundred fifty-seven thousand, four hundred fifty-eight".