121121111121101 has 32 divisors (see below), whose sum is σ = 151886776285440. Its totient is φ = 94022723418624.

The previous prime is 121121111121061. The next prime is 121121111121103. The reversal of 121121111121101 is 101121111121121.

It is a happy number.

It is not a de Polignac number, because 121121111121101 - 2⁶ = 121121111121037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121121111121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121111121103) 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, 621920126 + ... + 622114848.

It is an arithmetic number, because the mean of its divisors is an integer number (4746461758920).

Almost surely, 2^{121121111121101} is an apocalyptic number.

It is an amenable number.

121121111121101 is a deficient number, since it is larger than the sum of its proper divisors (30765665164339).

121121111121101 is a wasteful number, since it uses less digits than its factorization.

121121111121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323765.

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 121121111121101 its reverse (101121111121121), we get a palindrome (222242222242222).

The spelling of 121121111121101 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred one".