200202396421 has 2 divisors, whose sum is σ = 200202396422. Its totient is φ = 200202396420.

The previous prime is 200202396403. The next prime is 200202396553. The reversal of 200202396421 is 124693202002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131080202500 + 69122193921 = 362050^2 + 262911^2 .

It is a cyclic number.

It is not a de Polignac number, because 200202396421 - 2³¹ = 198054912773 is a prime.

It is a super-2 number, since 2×200202396421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200202396221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100101198210 + 100101198211.

It is an arithmetic number, because the mean of its divisors is an integer number (100101198211).

Almost surely, 2^200202396421 is an apocalyptic number.

It is an amenable number.

200202396421 is a deficient number, since it is larger than the sum of its proper divisors (1).

200202396421 is an equidigital number, since it uses as much as digits as its factorization.

200202396421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 200202396421 its reverse (124693202002), we get a palindrome (324895598423).

The spelling of 200202396421 in words is "two hundred billion, two hundred two million, three hundred ninety-six thousand, four hundred twenty-one".