121121111220101 has 4 divisors (see below), whose sum is σ = 121121496472704. Its totient is φ = 121120725967500.

The previous prime is 121121111220079. The next prime is 121121111220107. The reversal of 121121111220101 is 101022111121121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121121111220101 - 2¹⁴ = 121121111203717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121121111220101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121111220107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192154325 + ... + 192783626.

It is an arithmetic number, because the mean of its divisors is an integer number (30280374118176).

Almost surely, 2^{121121111220101} is an apocalyptic number.

It is an amenable number.

121121111220101 is a deficient number, since it is larger than the sum of its proper divisors (385252603).

121121111220101 is an equidigital number, since it uses as much as digits as its factorization.

121121111220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385252602.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121121111220101 its reverse (101022111121121), we get a palindrome (222143222341222).

The spelling of 121121111220101 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, one hundred one".