121111112101 has 12 divisors (see below), whose sum is σ = 141103496352. Its totient is φ = 103648052088.

The previous prime is 121111112099. The next prime is 121111112107. The reversal of 121111112101 is 101211111121.

It is not a de Polignac number, because 121111112101 - 2¹ = 121111112099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111112107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1890465 + ... + 1953478.

It is an arithmetic number, because the mean of its divisors is an integer number (11758624696).

Almost surely, 2^121111112101 is an apocalyptic number.

It is an amenable number.

121111112101 is a deficient number, since it is larger than the sum of its proper divisors (19992384251).

121111112101 is an equidigital number, since it uses as much as digits as its factorization.

121111112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3844600 (or 3844593 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 121111112101 its reverse (101211111121), we get a palindrome (222322223222).

The spelling of 121111112101 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred twelve thousand, one hundred one".