121100211043 has 4 divisors (see below), whose sum is σ = 138400241200. Its totient is φ = 103800180888.

The previous prime is 121100211019. The next prime is 121100211047. The reversal of 121100211043 is 340112001121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121100211043 is a prime.

It is a super-2 number, since 2×121100211043² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121100211047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8650015068 + ... + 8650015081.

It is an arithmetic number, because the mean of its divisors is an integer number (34600060300).

Almost surely, 2^121100211043 is an apocalyptic number.

121100211043 is a deficient number, since it is larger than the sum of its proper divisors (17300030157).

121100211043 is an equidigital number, since it uses as much as digits as its factorization.

121100211043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17300030156.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121100211043 its reverse (340112001121), we get a palindrome (461212212164).

The spelling of 121100211043 in words is "one hundred twenty-one billion, one hundred million, two hundred eleven thousand, forty-three".