121806785732 has 6 divisors (see below), whose sum is σ = 213161875038. Its totient is φ = 60903392864.

The previous prime is 121806785707. The next prime is 121806785753. The reversal of 121806785732 is 237587608121.

It can be written as a sum of positive squares in only one way, i.e., 121805188036 + 1597696 = 349006^2 + 1264^2 .

It is a super-2 number, since 2×121806785732² (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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15225848213 + ... + 15225848220.

It is an arithmetic number, because the mean of its divisors is an integer number (35526979173).

Almost surely, 2^121806785732 is an apocalyptic number.

It is an amenable number.

121806785732 is a deficient number, since it is larger than the sum of its proper divisors (91355089306).

121806785732 is a wasteful number, since it uses less digits than its factorization.

121806785732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30451696437 (or 30451696435 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 121806785732 in words is "one hundred twenty-one billion, eight hundred six million, seven hundred eighty-five thousand, seven hundred thirty-two".