65522215121 has 8 divisors (see below), whose sum is σ = 72690285600. Its totient is φ = 58556062240.

The previous prime is 65522215117. The next prime is 65522215127. The reversal of 65522215121 is 12151222556.

It is a happy number.

65522215121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65522215121 - 2² = 65522215117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65522215127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50478716 + ... + 50480013.

It is an arithmetic number, because the mean of its divisors is an integer number (9086285700).

Almost surely, 2^65522215121 is an apocalyptic number.

It is an amenable number.

65522215121 is a deficient number, since it is larger than the sum of its proper divisors (7168070479).

65522215121 is a wasteful number, since it uses less digits than its factorization.

65522215121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100958799.

The product of its digits is 12000, while the sum is 32.

Adding to 65522215121 its reverse (12151222556), we get a palindrome (77673437677).

The spelling of 65522215121 in words is "sixty-five billion, five hundred twenty-two million, two hundred fifteen thousand, one hundred twenty-one".