121202155 has 8 divisors (see below), whose sum is σ = 145533312. Its totient is φ = 96901248.

The previous prime is 121202131. The next prime is 121202171. The reversal of 121202155 is 551202121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121202155 - 2¹⁹ = 120677867 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 2467 + ... + 15763.

It is an arithmetic number, because the mean of its divisors is an integer number (18191664).

Almost surely, 2^121202155 is an apocalyptic number.

121202155 is a deficient number, since it is larger than the sum of its proper divisors (24331157).

121202155 is a wasteful number, since it uses less digits than its factorization.

121202155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15125.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 121202155 is about 11009.1850288748. The cubic root of 121202155 is about 494.8840390883.

Adding to 121202155 its reverse (551202121), we get a palindrome (672404276).

The spelling of 121202155 in words is "one hundred twenty-one million, two hundred two thousand, one hundred fifty-five".