121024115155 has 8 divisors (see below), whose sum is σ = 145238073552. Its totient is φ = 96813201888.

The previous prime is 121024115153. The next prime is 121024115239. The reversal of 121024115155 is 551511420121.

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 121024115155 - 2¹ = 121024115153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121024115153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672912 + ... + 833581.

It is an arithmetic number, because the mean of its divisors is an integer number (18154759194).

Almost surely, 2^121024115155 is an apocalyptic number.

121024115155 is a deficient number, since it is larger than the sum of its proper divisors (24213958397).

121024115155 is a wasteful number, since it uses less digits than its factorization.

121024115155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522565.

The product of its (nonzero) digits is 2000, while the sum is 28.

Adding to 121024115155 its reverse (551511420121), we get a palindrome (672535535276).

The spelling of 121024115155 in words is "one hundred twenty-one billion, twenty-four million, one hundred fifteen thousand, one hundred fifty-five".