121705692038 has 16 divisors (see below), whose sum is σ = 210552444960. Its totient is φ = 51681053376.

The previous prime is 121705691969. The next prime is 121705692047. The reversal of 121705692038 is 830296507121.

It is a self number, because there is not a number n which added to its sum of digits gives 121705692038.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39875831 + ... + 39878882.

It is an arithmetic number, because the mean of its divisors is an integer number (13159527810).

Almost surely, 2^121705692038 is an apocalyptic number.

121705692038 is a deficient number, since it is larger than the sum of its proper divisors (88846752922).

121705692038 is a wasteful number, since it uses less digits than its factorization.

121705692038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79754831.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 121705692038 in words is "one hundred twenty-one billion, seven hundred five million, six hundred ninety-two thousand, thirty-eight".