121111121103 has 32 divisors (see below), whose sum is σ = 189346386432. Its totient is φ = 67413081600.

The previous prime is 121111121101. The next prime is 121111121107. The reversal of 121111121103 is 301121111121.

It is not a de Polignac number, because 121111121103 - 2¹ = 121111121101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111121101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 444243 + ... + 663003.

It is an arithmetic number, because the mean of its divisors is an integer number (5917074576).

Almost surely, 2^121111121103 is an apocalyptic number.

121111121103 is a deficient number, since it is larger than the sum of its proper divisors (68235265329).

121111121103 is a wasteful number, since it uses less digits than its factorization.

121111121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219455.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 121111121103 its reverse (301121111121), we get a palindrome (422232232224).

The spelling of 121111121103 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred three".