121121201022121 has 8 divisors (see below), whose sum is σ = 128273480527104. Its totient is φ = 113971977403200.

The previous prime is 121121201022091. The next prime is 121121201022161. The reversal of 121121201022121 is 121220102121121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121121201022121 - 2⁵ = 121121201022089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121201022161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763889905 + ... + 764048446.

It is an arithmetic number, because the mean of its divisors is an integer number (16034185065888).

Almost surely, 2^{121121201022121} is an apocalyptic number.

It is an amenable number.

121121201022121 is a deficient number, since it is larger than the sum of its proper divisors (7152279504983).

121121201022121 is a wasteful number, since it uses less digits than its factorization.

121121201022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527943031.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121121201022121 its reverse (121220102121121), we get a palindrome (242341303143242).

The spelling of 121121201022121 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred one million, twenty-two thousand, one hundred twenty-one".