9561010050121 has 2 divisors, whose sum is σ = 9561010050122. Its totient is φ = 9561010050120.

The previous prime is 9561010050101. The next prime is 9561010050127. The reversal of 9561010050121 is 1210500101659.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7370790606400 + 2190219443721 = 2714920^2 + 1479939^2 .

It is an emirp because it is prime and its reverse (1210500101659) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9561010050121 - 2³³ = 9552420115529 is a prime.

It is a super-2 number, since 2×9561010050121² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9561010050127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4780505025060 + 4780505025061.

It is an arithmetic number, because the mean of its divisors is an integer number (4780505025061).

Almost surely, 2^{9561010050121} is an apocalyptic number.

It is an amenable number.

9561010050121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9561010050121 is an equidigital number, since it uses as much as digits as its factorization.

9561010050121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 31.

The spelling of 9561010050121 in words is "nine trillion, five hundred sixty-one billion, ten million, fifty thousand, one hundred twenty-one".