1203122122021 has 2 divisors, whose sum is σ = 1203122122022. Its totient is φ = 1203122122020.

The previous prime is 1203122121979. The next prime is 1203122122067. The reversal of 1203122122021 is 1202212213021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 861581229796 + 341540892225 = 928214^2 + 584415^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203122122021 - 2¹⁷ = 1203121990949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1203122122021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203122122091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601561061010 + 601561061011.

It is an arithmetic number, because the mean of its divisors is an integer number (601561061011).

Almost surely, 2^{1203122122021} is an apocalyptic number.

It is an amenable number.

1203122122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203122122021 is an equidigital number, since it uses as much as digits as its factorization.

1203122122021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1203122122021 its reverse (1202212213021), we get a palindrome (2405334335042).

The spelling of 1203122122021 in words is "one trillion, two hundred three billion, one hundred twenty-two million, one hundred twenty-two thousand, twenty-one".