20110021231021 has 8 divisors (see below), whose sum is σ = 20866289794304. Its totient is φ = 19360475055360.

The previous prime is 20110021231009. The next prime is 20110021231049. The reversal of 20110021231021 is 12013212001102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110021231021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110021230986 and 20110021231004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110021231051) 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, 1680590811 + ... + 1680602776.

It is an arithmetic number, because the mean of its divisors is an integer number (2608286224288).

Almost surely, 2^{20110021231021} is an apocalyptic number.

It is an amenable number.

20110021231021 is a deficient number, since it is larger than the sum of its proper divisors (756268563283).

20110021231021 is a wasteful number, since it uses less digits than its factorization.

20110021231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361193811.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20110021231021 its reverse (12013212001102), we get a palindrome (32123233232123).

The spelling of 20110021231021 in words is "twenty trillion, one hundred ten billion, twenty-one million, two hundred thirty-one thousand, twenty-one".