121121002111 has 2 divisors, whose sum is σ = 121121002112. Its totient is φ = 121121002110.

The previous prime is 121121002109. The next prime is 121121002129. The reversal of 121121002111 is 111200121121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121121002111 - 2¹ = 121121002109 is a prime.

Together with 121121002109, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121121002091 and 121121002100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121121002711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560501055 + 60560501056.

It is an arithmetic number, because the mean of its divisors is an integer number (60560501056).

Almost surely, 2^121121002111 is an apocalyptic number.

121121002111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121002111 is an equidigital number, since it uses as much as digits as its factorization.

121121002111 is an evil number, because the sum of its binary digits is even.

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

Adding to 121121002111 its reverse (111200121121), we get a palindrome (232321123232).

The spelling of 121121002111 in words is "one hundred twenty-one billion, one hundred twenty-one million, two thousand, one hundred eleven".