121202120120101 has 4 divisors (see below), whose sum is σ = 128331656597772. Its totient is φ = 114072583642432.

The previous prime is 121202120120077. The next prime is 121202120120117. The reversal of 121202120120101 is 101021021202121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86327307980001 + 34874812140100 = 9291249^2 + 5905490^2 .

It is a cyclic number.

It is not a de Polignac number, because 121202120120101 - 2⁵ = 121202120120069 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 (121202120120161) 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, 3564768238810 + ... + 3564768238843.

It is an arithmetic number, because the mean of its divisors is an integer number (32082914149443).

Almost surely, 2^{121202120120101} is an apocalyptic number.

It is an amenable number.

121202120120101 is a deficient number, since it is larger than the sum of its proper divisors (7129536477671).

121202120120101 is an equidigital number, since it uses as much as digits as its factorization.

121202120120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129536477670.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121202120120101 its reverse (101021021202121), we get a palindrome (222223141322222).

The spelling of 121202120120101 in words is "one hundred twenty-one trillion, two hundred two billion, one hundred twenty million, one hundred twenty thousand, one hundred one".