121274541945 has 96 divisors (see below), whose sum is σ = 226797296544. Its totient is φ = 59725209600.

The previous prime is 121274541901. The next prime is 121274541959. The reversal of 121274541945 is 549145472121.

It is a happy number.

121274541945 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 7 + 454 + 194 + 5 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 114029808489 + 7244733456 = 337683^2 + 85116^2 .

It is not a de Polignac number, because 121274541945 - 2¹² = 121274537849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121274541945.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19642879 + ... + 19649051.

It is an arithmetic number, because the mean of its divisors is an integer number (2362471839).

Almost surely, 2^121274541945 is an apocalyptic number.

121274541945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121274541945 is a deficient number, since it is larger than the sum of its proper divisors (105522754599).

121274541945 is a wasteful number, since it uses less digits than its factorization.

121274541945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6683 (or 6680 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The spelling of 121274541945 in words is "one hundred twenty-one billion, two hundred seventy-four million, five hundred forty-one thousand, nine hundred forty-five".