202130401261 has 2 divisors, whose sum is σ = 202130401262. Its totient is φ = 202130401260.

The previous prime is 202130401243. The next prime is 202130401283. The reversal of 202130401261 is 162104031202.

It is an a-pointer prime, because the next prime (202130401283) can be obtained adding 202130401261 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., 201426825636 + 703575625 = 448806^2 + 26525^2 .

It is a cyclic number.

It is not a de Polignac number, because 202130401261 - 2⁷ = 202130401133 is a prime.

It is a super-2 number, since 2×202130401261² (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 (202130404261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101065200630 + 101065200631.

It is an arithmetic number, because the mean of its divisors is an integer number (101065200631).

Almost surely, 2^202130401261 is an apocalyptic number.

It is an amenable number.

202130401261 is a deficient number, since it is larger than the sum of its proper divisors (1).

202130401261 is an equidigital number, since it uses as much as digits as its factorization.

202130401261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 202130401261 its reverse (162104031202), we get a palindrome (364234432463).

The spelling of 202130401261 in words is "two hundred two billion, one hundred thirty million, four hundred one thousand, two hundred sixty-one".