124203202021 has 2 divisors, whose sum is σ = 124203202022. Its totient is φ = 124203202020.

The previous prime is 124203202009. The next prime is 124203202061. The reversal of 124203202021 is 120202302421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123081688900 + 1121513121 = 350830^2 + 33489^2 .

It is a cyclic number.

It is not a de Polignac number, because 124203202021 - 2⁷ = 124203201893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 124203202021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124203202061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62101601010 + 62101601011.

It is an arithmetic number, because the mean of its divisors is an integer number (62101601011).

Almost surely, 2^124203202021 is an apocalyptic number.

It is an amenable number.

124203202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124203202021 is an equidigital number, since it uses as much as digits as its factorization.

124203202021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 124203202021 its reverse (120202302421), we get a palindrome (244405504442).

The spelling of 124203202021 in words is "one hundred twenty-four billion, two hundred three million, two hundred two thousand, twenty-one".