121867155 has 48 divisors (see below), whose sum is σ = 216833760. Its totient is φ = 63297024.

The previous prime is 121867111. The next prime is 121867177. The reversal of 121867155 is 551768121.

It is not a de Polignac number, because 121867155 - 2⁶ = 121867091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 522919 + ... + 523151.

It is an arithmetic number, because the mean of its divisors is an integer number (4517370).

Almost surely, 2^121867155 is an apocalyptic number.

121867155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121867155 is a deficient number, since it is larger than the sum of its proper divisors (94966605).

121867155 is a wasteful number, since it uses less digits than its factorization.

121867155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 497 counting only the distinct ones).

The product of its digits is 16800, while the sum is 36.

The square root of 121867155 is about 11039.3457686586. The cubic root of 121867155 is about 495.7874823940.

The spelling of 121867155 in words is "one hundred twenty-one million, eight hundred sixty-seven thousand, one hundred fifty-five".