20021022110021 has 8 divisors (see below), whose sum is σ = 20116858146144. Its totient is φ = 19925195033520.

The previous prime is 20021022109973. The next prime is 20021022110039. The reversal of 20021022110021 is 12001122012002.

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 20021022110021 - 2³⁸ = 19746144203077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021022109978 and 20021022110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021022113021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2261555 + ... + 6719871.

It is an arithmetic number, because the mean of its divisors is an integer number (2514607268268).

Almost surely, 2^{20021022110021} is an apocalyptic number.

It is an amenable number.

20021022110021 is a deficient number, since it is larger than the sum of its proper divisors (95836036123).

20021022110021 is a wasteful number, since it uses less digits than its factorization.

20021022110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4479811.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20021022110021 its reverse (12001122012002), we get a palindrome (32022144122023).

The spelling of 20021022110021 in words is "twenty trillion, twenty-one billion, twenty-two million, one hundred ten thousand, twenty-one".