121111500211 has 16 divisors (see below), whose sum is σ = 130970790720. Its totient is φ = 111330760320.

The previous prime is 121111500179. The next prime is 121111500221. The reversal of 121111500211 is 112005111121.

It is not a de Polignac number, because 121111500211 - 2⁵ = 121111500179 is a prime.

It is a super-3 number, since 3×121111500211³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121111500221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3030586 + ... + 3070288.

It is an arithmetic number, because the mean of its divisors is an integer number (8185674420).

Almost surely, 2^121111500211 is an apocalyptic number.

121111500211 is a deficient number, since it is larger than the sum of its proper divisors (9859290509).

121111500211 is a wasteful number, since it uses less digits than its factorization.

121111500211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40686.

The product of its (nonzero) digits is 20, while the sum is 16.

Adding to 121111500211 its reverse (112005111121), we get a palindrome (233116611332).

The spelling of 121111500211 in words is "one hundred twenty-one billion, one hundred eleven million, five hundred thousand, two hundred eleven".