121321020001 has 2 divisors, whose sum is σ = 121321020002. Its totient is φ = 121321020000.

The previous prime is 121321019993. The next prime is 121321020049. The reversal of 121321020001 is 100020123121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115205936400 + 6115083601 = 339420^2 + 78199^2 .

It is a cyclic number.

It is not a de Polignac number, because 121321020001 - 2³ = 121321019993 is a prime.

It is not a weakly prime, because it can be changed into another prime (121324020001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660510000 + 60660510001.

It is an arithmetic number, because the mean of its divisors is an integer number (60660510001).

Almost surely, 2^121321020001 is an apocalyptic number.

It is an amenable number.

121321020001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121321020001 is an equidigital number, since it uses as much as digits as its factorization.

121321020001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121321020001 its reverse (100020123121), we get a palindrome (221341143122).

The spelling of 121321020001 in words is "one hundred twenty-one billion, three hundred twenty-one million, twenty thousand, one".