9877237121 has 2 divisors, whose sum is σ = 9877237122. Its totient is φ = 9877237120.

The previous prime is 9877237109. The next prime is 9877237147. The reversal of 9877237121 is 1217327789.

9877237121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7834197121 + 2043040000 = 88511^2 + 45200^2 .

It is a cyclic number.

It is not a de Polignac number, because 9877237121 - 2¹⁸ = 9876974977 is a prime.

It is not a weakly prime, because it can be changed into another prime (9877137121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4938618560 + 4938618561.

It is an arithmetic number, because the mean of its divisors is an integer number (4938618561).

Almost surely, 2^9877237121 is an apocalyptic number.

It is an amenable number.

9877237121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9877237121 is an equidigital number, since it uses as much as digits as its factorization.

9877237121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 47.

The square root of 9877237121 is about 99384.2901116670. The cubic root of 9877237121 is about 2145.5822119003.

The spelling of 9877237121 in words is "nine billion, eight hundred seventy-seven million, two hundred thirty-seven thousand, one hundred twenty-one".