121111007 has 6 divisors (see below), whose sum is σ = 124138704. Its totient is φ = 118155440.

The previous prime is 121110991. The next prime is 121111021. The reversal of 121111007 is 700111121.

It is not a de Polignac number, because 121111007 - 2⁴ = 121110991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121110982 and 121111000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34343 + ... + 37704.

It is an arithmetic number, because the mean of its divisors is an integer number (20689784).

Almost surely, 2^121111007 is an apocalyptic number.

121111007 is a deficient number, since it is larger than the sum of its proper divisors (3027697).

121111007 is an frugal number, since it uses more digits than its factorization.

121111007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72129 (or 72088 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 14.

The square root of 121111007 is about 11005.0446159932. The cubic root of 121111007 is about 494.7599516285.

Adding to 121111007 its reverse (700111121), we get a palindrome (821222128).

The spelling of 121111007 in words is "one hundred twenty-one million, one hundred eleven thousand, seven".