163652121231221 has 32 divisors (see below), whose sum is σ = 196196129783808. Its totient is φ = 133568600780160.

The previous prime is 163652121231149. The next prime is 163652121231223. The reversal of 163652121231221 is 122132121256361.

It is a de Polignac number, because none of the positive numbers 2^k-163652121231221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163652121231223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11379956 + ... + 21373058.

It is an arithmetic number, because the mean of its divisors is an integer number (6131129055744).

Almost surely, 2^{163652121231221} is an apocalyptic number.

It is an amenable number.

163652121231221 is a deficient number, since it is larger than the sum of its proper divisors (32544008552587).

163652121231221 is a wasteful number, since it uses less digits than its factorization.

163652121231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9994521.

The product of its digits is 51840, while the sum is 38.

Adding to 163652121231221 its reverse (122132121256361), we get a palindrome (285784242487582).

The spelling of 163652121231221 in words is "one hundred sixty-three trillion, six hundred fifty-two billion, one hundred twenty-one million, two hundred thirty-one thousand, two hundred twenty-one".