121601710170542 has 32 divisors (see below), whose sum is σ = 208816734830592. Its totient is φ = 52025864471424.

The previous prime is 121601710170511. The next prime is 121601710170547. The reversal of 121601710170542 is 245071017106121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121601710170496 and 121601710170505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121601710170547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136057958 + ... + 136948790.

It is an arithmetic number, because the mean of its divisors is an integer number (6525522963456).

Almost surely, 2^{121601710170542} is an apocalyptic number.

121601710170542 is a deficient number, since it is larger than the sum of its proper divisors (87215024660050).

121601710170542 is a wasteful number, since it uses less digits than its factorization.

121601710170542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907512.

The product of its (nonzero) digits is 23520, while the sum is 38.

Adding to 121601710170542 its reverse (245071017106121), we get a palindrome (366672727276663).

The spelling of 121601710170542 in words is "one hundred twenty-one trillion, six hundred one billion, seven hundred ten million, one hundred seventy thousand, five hundred forty-two".