121645611105 has 64 divisors (see below), whose sum is σ = 203795343360. Its totient is φ = 61880426496.

The previous prime is 121645611097. The next prime is 121645611133. The reversal of 121645611105 is 501116546121.

It is not a de Polignac number, because 121645611105 - 2³ = 121645611097 is a prime.

It is a super-2 number, since 2×121645611105² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25863184 + ... + 25867886.

It is an arithmetic number, because the mean of its divisors is an integer number (3184302240).

Almost surely, 2^121645611105 is an apocalyptic number.

121645611105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121645611105 is a deficient number, since it is larger than the sum of its proper divisors (82149732255).

121645611105 is a wasteful number, since it uses less digits than its factorization.

121645611105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5450.

The product of its (nonzero) digits is 7200, while the sum is 33.

The spelling of 121645611105 in words is "one hundred twenty-one billion, six hundred forty-five million, six hundred eleven thousand, one hundred five".