121203432121 has 2 divisors, whose sum is σ = 121203432122. Its totient is φ = 121203432120.

The previous prime is 121203432107. The next prime is 121203432149. The reversal of 121203432121 is 121234302121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105406712896 + 15796719225 = 324664^2 + 125685^2 .

It is an emirp because it is prime and its reverse (121234302121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121203432121 - 2¹⁷ = 121203301049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121203432092 and 121203432101.

It is not a weakly prime, because it can be changed into another prime (121203432151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60601716060 + 60601716061.

It is an arithmetic number, because the mean of its divisors is an integer number (60601716061).

Almost surely, 2^121203432121 is an apocalyptic number.

It is an amenable number.

121203432121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121203432121 is an equidigital number, since it uses as much as digits as its factorization.

121203432121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 121203432121 its reverse (121234302121), we get a palindrome (242437734242).

The spelling of 121203432121 in words is "one hundred twenty-one billion, two hundred three million, four hundred thirty-two thousand, one hundred twenty-one".