202012250021 has 2 divisors, whose sum is σ = 202012250022. Its totient is φ = 202012250020.

The previous prime is 202012249981. The next prime is 202012250059. The reversal of 202012250021 is 120052210202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114981349921 + 87030900100 = 339089^2 + 295010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202012250021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202012256021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101006125010 + 101006125011.

It is an arithmetic number, because the mean of its divisors is an integer number (101006125011).

Almost surely, 2^202012250021 is an apocalyptic number.

It is an amenable number.

202012250021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202012250021 is an equidigital number, since it uses as much as digits as its factorization.

202012250021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 202012250021 its reverse (120052210202), we get a palindrome (322064460223).

The spelling of 202012250021 in words is "two hundred two billion, twelve million, two hundred fifty thousand, twenty-one".