402230202421 has 2 divisors, whose sum is σ = 402230202422. Its totient is φ = 402230202420.

The previous prime is 402230202401. The next prime is 402230202443. The reversal of 402230202421 is 124202032204.

It is an a-pointer prime, because the next prime (402230202443) can be obtained adding 402230202421 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 265725816196 + 136504386225 = 515486^2 + 369465^2 .

It is a cyclic number.

It is not a de Polignac number, because 402230202421 - 2¹³ = 402230194229 is a prime.

It is a super-2 number, since 2×402230202421² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402230202392 and 402230202401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402230202401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201115101210 + 201115101211.

It is an arithmetic number, because the mean of its divisors is an integer number (201115101211).

Almost surely, 2^402230202421 is an apocalyptic number.

It is an amenable number.

402230202421 is a deficient number, since it is larger than the sum of its proper divisors (1).

402230202421 is an equidigital number, since it uses as much as digits as its factorization.

402230202421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 402230202421 its reverse (124202032204), we get a palindrome (526432234625).

The spelling of 402230202421 in words is "four hundred two billion, two hundred thirty million, two hundred two thousand, four hundred twenty-one".