121500445405 has 16 divisors (see below), whose sum is σ = 146985871104. Its totient is φ = 96411303040.

The previous prime is 121500445343. The next prime is 121500445447. The reversal of 121500445405 is 504544005121.

It is a happy number.

It is not a de Polignac number, because 121500445405 - 2¹¹ = 121500443357 is a prime.

It is a super-2 number, since 2×121500445405² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 765240 + ... + 910270.

It is an arithmetic number, because the mean of its divisors is an integer number (9186616944).

Almost surely, 2^121500445405 is an apocalyptic number.

It is an amenable number.

121500445405 is a deficient number, since it is larger than the sum of its proper divisors (25485425699).

121500445405 is a wasteful number, since it uses less digits than its factorization.

121500445405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146396.

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 121500445405 in words is "one hundred twenty-one billion, five hundred million, four hundred forty-five thousand, four hundred five".