9697887966121 has 4 divisors (see below), whose sum is σ = 9698159203200. Its totient is φ = 9697616729044.

The previous prime is 9697887966101. The next prime is 9697887966127. The reversal of 9697887966121 is 1216697887969.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9697887966121 - 2¹⁹ = 9697887441833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9697887966127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135564901 + ... + 135636418.

It is an arithmetic number, because the mean of its divisors is an integer number (2424539800800).

Almost surely, 2^{9697887966121} is an apocalyptic number.

It is an amenable number.

9697887966121 is a deficient number, since it is larger than the sum of its proper divisors (271237079).

9697887966121 is a wasteful number, since it uses less digits than its factorization.

9697887966121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271237078.

The product of its digits is 987614208, while the sum is 79.

The spelling of 9697887966121 in words is "nine trillion, six hundred ninety-seven billion, eight hundred eighty-seven million, nine hundred sixty-six thousand, one hundred twenty-one".