121112122211 has 8 divisors (see below), whose sum is σ = 128298561984. Its totient is φ = 113932593280.

The previous prime is 121112122133. The next prime is 121112122267. The reversal of 121112122211 is 112221211121.

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 121112122211 - 2³⁴ = 103932253027 is a prime.

It is a super-2 number, since 2×121112122211² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121112122211.

It is not an unprimeable number, because it can be changed into a prime (121112122711) 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, 1691600 + ... + 1761741.

It is an arithmetic number, because the mean of its divisors is an integer number (16037320248).

Almost surely, 2^121112122211 is an apocalyptic number.

121112122211 is a deficient number, since it is larger than the sum of its proper divisors (7186439773).

121112122211 is a wasteful number, since it uses less digits than its factorization.

121112122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455421.

The product of its digits is 32, while the sum is 17.

Adding to 121112122211 its reverse (112221211121), we get a palindrome (233333333332).

The spelling of 121112122211 in words is "one hundred twenty-one billion, one hundred twelve million, one hundred twenty-two thousand, two hundred eleven".