121761605452 has 6 divisors (see below), whose sum is σ = 213082809548. Its totient is φ = 60880802724.

The previous prime is 121761605401. The next prime is 121761605461. The reversal of 121761605452 is 254506167121.

It is a super-2 number, since 2×121761605452² (a number of 23 digits) contains 22 as substring.

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, 15220200678 + ... + 15220200685.

Almost surely, 2^121761605452 is an apocalyptic number.

It is an amenable number.

121761605452 is a deficient number, since it is larger than the sum of its proper divisors (91321204096).

121761605452 is a wasteful number, since it uses less digits than its factorization.

121761605452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30440401367 (or 30440401365 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 121761605452 in words is "one hundred twenty-one billion, seven hundred sixty-one million, six hundred five thousand, four hundred fifty-two".