1023201000121 has 2 divisors, whose sum is σ = 1023201000122. Its totient is φ = 1023201000120.

The previous prime is 1023201000079. The next prime is 1023201000169. The reversal of 1023201000121 is 1210001023201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1022547686521 + 653313600 = 1011211^2 + 25560^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023201000121 - 2⁷ = 1023200999993 is a prime.

It is a super-2 number, since 2×1023201000121² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1023201000191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511600500060 + 511600500061.

It is an arithmetic number, because the mean of its divisors is an integer number (511600500061).

Almost surely, 2^{1023201000121} is an apocalyptic number.

It is an amenable number.

1023201000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023201000121 is an equidigital number, since it uses as much as digits as its factorization.

1023201000121 is an evil number, because the sum of its binary digits is even.

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

Adding to 1023201000121 its reverse (1210001023201), we get a palindrome (2233202023322).

The spelling of 1023201000121 in words is "one trillion, twenty-three billion, two hundred one million, one hundred twenty-one", and thus it is an aban number.