121762112661 has 24 divisors (see below), whose sum is σ = 201014933184. Its totient is φ = 69574608000.

The previous prime is 121762112561. The next prime is 121762112713. The reversal of 121762112661 is 166211267121.

121762112661 is a `hidden beast` number, since 1 + 2 + 1 + 7 + 621 + 1 + 26 + 6 + 1 = 666.

It is not a de Polignac number, because 121762112661 - 2⁷ = 121762112533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121762112561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1487965 + ... + 1567661.

It is an arithmetic number, because the mean of its divisors is an integer number (8375622216).

Almost surely, 2^121762112661 is an apocalyptic number.

It is an amenable number.

121762112661 is a deficient number, since it is larger than the sum of its proper divisors (79252820523).

121762112661 is a wasteful number, since it uses less digits than its factorization.

121762112661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103961 (or 103958 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

Adding to 121762112661 its reverse (166211267121), we get a palindrome (287973379782).

The spelling of 121762112661 in words is "one hundred twenty-one billion, seven hundred sixty-two million, one hundred twelve thousand, six hundred sixty-one".