121105155056 has 20 divisors (see below), whose sum is σ = 234657866352. Its totient is φ = 60548286336.

The previous prime is 121105155047. The next prime is 121105155107. The reversal of 121105155056 is 650551501121.

It is a super-2 number, since 2×121105155056² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28901 + ... + 492996.

Almost surely, 2^121105155056 is an apocalyptic number.

121105155056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121105155056 is a deficient number, since it is larger than the sum of its proper divisors (113552711296).

121105155056 is a wasteful number, since it uses less digits than its factorization.

121105155056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536408 (or 536402 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 32.

Adding to 121105155056 its reverse (650551501121), we get a palindrome (771656656177).

The spelling of 121105155056 in words is "one hundred twenty-one billion, one hundred five million, one hundred fifty-five thousand, fifty-six".