121000121111 has 8 divisors (see below), whose sum is σ = 128132004240. Its totient is φ = 113869819008.

The previous prime is 121000121107. The next prime is 121000121117. The reversal of 121000121111 is 111121000121.

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 121000121111 - 2² = 121000121107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121000121092 and 121000121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000121117) 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, 235841 + ... + 545546.

It is an arithmetic number, because the mean of its divisors is an integer number (16016500530).

Almost surely, 2^121000121111 is an apocalyptic number.

121000121111 is a deficient number, since it is larger than the sum of its proper divisors (7131883129).

121000121111 is an equidigital number, since it uses as much as digits as its factorization.

121000121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790513.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121000121111 its reverse (111121000121), we get a palindrome (232121121232).

It can be divided in two parts, 121000121 and 111, that multiplied together give a palindrome (13431013431).

The spelling of 121000121111 in words is "one hundred twenty-one billion, one hundred twenty-one thousand, one hundred eleven".