121000112001111 has 24 divisors (see below), whose sum is σ = 189608422951920. Its totient is φ = 68430107515392.

The previous prime is 121000112001053. The next prime is 121000112001127. The reversal of 121000112001111 is 111100211000121.

It is not a de Polignac number, because 121000112001111 - 2⁷ = 121000112000983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000112001011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4242923956 + ... + 4242952473.

It is an arithmetic number, because the mean of its divisors is an integer number (7900350956330).

Almost surely, 2^{121000112001111} is an apocalyptic number.

121000112001111 is a deficient number, since it is larger than the sum of its proper divisors (68608310950809).

121000112001111 is an equidigital number, since it uses as much as digits as its factorization.

121000112001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8485876543 (or 8485876536 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121000112001111 its reverse (111100211000121), we get a palindrome (232100323001232).

The spelling of 121000112001111 in words is "one hundred twenty-one trillion, one hundred twelve million, one thousand, one hundred eleven".