202120124281 has 2 divisors, whose sum is σ = 202120124282. Its totient is φ = 202120124280.

The previous prime is 202120124267. The next prime is 202120124333. The reversal of 202120124281 is 182421021202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167104358656 + 35015765625 = 408784^2 + 187125^2 .

It is a cyclic number.

It is not a de Polignac number, because 202120124281 - 2¹⁹ = 202119599993 is a prime.

It is a super-2 number, since 2×202120124281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (202120124251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060062140 + 101060062141.

It is an arithmetic number, because the mean of its divisors is an integer number (101060062141).

Almost surely, 2^202120124281 is an apocalyptic number.

It is an amenable number.

202120124281 is a deficient number, since it is larger than the sum of its proper divisors (1).

202120124281 is an equidigital number, since it uses as much as digits as its factorization.

202120124281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 25.

Adding to 202120124281 its reverse (182421021202), we get a palindrome (384541145483).

The spelling of 202120124281 in words is "two hundred two billion, one hundred twenty million, one hundred twenty-four thousand, two hundred eighty-one".