121203133021 has 2 divisors, whose sum is σ = 121203133022. Its totient is φ = 121203133020.

The previous prime is 121203133001. The next prime is 121203133063. The reversal of 121203133021 is 120331302121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120816027396 + 387105625 = 347586^2 + 19675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121203133021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121203133021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121203133001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60601566510 + 60601566511.

It is an arithmetic number, because the mean of its divisors is an integer number (60601566511).

Almost surely, 2^121203133021 is an apocalyptic number.

It is an amenable number.

121203133021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121203133021 is an equidigital number, since it uses as much as digits as its factorization.

121203133021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 121203133021 its reverse (120331302121), we get a palindrome (241534435142).

The spelling of 121203133021 in words is "one hundred twenty-one billion, two hundred three million, one hundred thirty-three thousand, twenty-one".