121111112202121 has 32 divisors (see below), whose sum is σ = 139004093260800. Its totient is φ = 104830818892800.

The previous prime is 121111112202061. The next prime is 121111112202127. The reversal of 121111112202121 is 121202211111121.

It is not a de Polignac number, because 121111112202121 - 2⁹ = 121111112201609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121111112202127) 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, 19635030 + ... + 25055071.

It is an arithmetic number, because the mean of its divisors is an integer number (4343877914400).

Almost surely, 2^{121111112202121} is an apocalyptic number.

It is an amenable number.

121111112202121 is a deficient number, since it is larger than the sum of its proper divisors (17892981058679).

121111112202121 is a wasteful number, since it uses less digits than its factorization.

121111112202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44690409.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 121111112202121 its reverse (121202211111121), we get a palindrome (242313323313242).

The spelling of 121111112202121 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred twelve million, two hundred two thousand, one hundred twenty-one".