121201001101 has 4 divisors (see below), whose sum is σ = 128330471772. Its totient is φ = 114071530432.

The previous prime is 121201001099. The next prime is 121201001123. The reversal of 121201001101 is 101100102121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101100102121 = 659 ⋅153414419.

It can be written as a sum of positive squares in 2 ways, for example, as 87657444900 + 33543556201 = 296070^2 + 183149^2 .

It is a cyclic number.

It is not a de Polignac number, because 121201001101 - 2¹ = 121201001099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201001161) 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, 3564735310 + ... + 3564735343.

It is an arithmetic number, because the mean of its divisors is an integer number (32082617943).

Almost surely, 2^121201001101 is an apocalyptic number.

It is an amenable number.

121201001101 is a deficient number, since it is larger than the sum of its proper divisors (7129470671).

121201001101 is an equidigital number, since it uses as much as digits as its factorization.

121201001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129470670.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121201001101 its reverse (101100102121), we get a palindrome (222301103222).

The spelling of 121201001101 in words is "one hundred twenty-one billion, two hundred one million, one thousand, one hundred one".