121220021101101 has 16 divisors (see below), whose sum is σ = 174060101033280. Its totient is φ = 74596685967360.

The previous prime is 121220021101087. The next prime is 121220021101117. The reversal of 121220021101101 is 101101120022121.

It is a happy number.

It is not a de Polignac number, because 121220021101101 - 2⁷ = 121220021100973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220021101171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6929581 + ... + 17042861.

It is an arithmetic number, because the mean of its divisors is an integer number (10878756314580).

Almost surely, 2^{121220021101101} is an apocalyptic number.

It is an amenable number.

121220021101101 is a deficient number, since it is larger than the sum of its proper divisors (52840079932179).

121220021101101 is a wasteful number, since it uses less digits than its factorization.

121220021101101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10420636.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121220021101101 its reverse (101101120022121), we get a palindrome (222321141123222).

The spelling of 121220021101101 in words is "one hundred twenty-one trillion, two hundred twenty billion, twenty-one million, one hundred one thousand, one hundred one".