20321220101 has 8 divisors (see below), whose sum is σ = 25010732544. Its totient is φ = 16078327920.

The previous prime is 20321220077. The next prime is 20321220133. The reversal of 20321220101 is 10102212302.

It is a happy number.

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 20321220101 - 2³⁰ = 19247478277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321220701) 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, 111654965 + ... + 111655146.

It is an arithmetic number, because the mean of its divisors is an integer number (3126341568).

Almost surely, 2^20321220101 is an apocalyptic number.

It is an amenable number.

20321220101 is a deficient number, since it is larger than the sum of its proper divisors (4689512443).

20321220101 is a wasteful number, since it uses less digits than its factorization.

20321220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223310131.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20321220101 its reverse (10102212302), we get a palindrome (30423432403).

The spelling of 20321220101 in words is "twenty billion, three hundred twenty-one million, two hundred twenty thousand, one hundred one".