1023421510121 has 2 divisors, whose sum is σ = 1023421510122. Its totient is φ = 1023421510120.

The previous prime is 1023421510079. The next prime is 1023421510211. The reversal of 1023421510121 is 1210151243201.

Together with next prime (1023421510211) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717131210896 + 306290299225 = 846836^2 + 553435^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023421510121 - 2¹⁴ = 1023421493737 is a prime.

It is not a weakly prime, because it can be changed into another prime (1023421510021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511710755060 + 511710755061.

It is an arithmetic number, because the mean of its divisors is an integer number (511710755061).

Almost surely, 2^{1023421510121} is an apocalyptic number.

It is an amenable number.

1023421510121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023421510121 is an equidigital number, since it uses as much as digits as its factorization.

1023421510121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 1023421510121 its reverse (1210151243201), we get a palindrome (2233572753322).

The spelling of 1023421510121 in words is "one trillion, twenty-three billion, four hundred twenty-one million, five hundred ten thousand, one hundred twenty-one".