121100211211 has 16 divisors (see below), whose sum is σ = 139151271168. Its totient is φ = 103238100000.

The previous prime is 121100211191. The next prime is 121100211217. The reversal of 121100211211 is 112112001121.

It is a happy number.

It is not a de Polignac number, because 121100211211 - 2⁷ = 121100211083 is a prime.

It is a super-2 number, since 2×121100211211² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121100211191 and 121100211200.

It is not an unprimeable number, because it can be changed into a prime (121100211217) 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, 1182496 + ... + 1280818.

It is an arithmetic number, because the mean of its divisors is an integer number (8696954448).

Almost surely, 2^121100211211 is an apocalyptic number.

121100211211 is a deficient number, since it is larger than the sum of its proper divisors (18051059957).

121100211211 is an equidigital number, since it uses as much as digits as its factorization.

121100211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99282.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121100211211 its reverse (112112001121), we get a palindrome (233212212332).

The spelling of 121100211211 in words is "one hundred twenty-one billion, one hundred million, two hundred eleven thousand, two hundred eleven".