20021102010231 has 64 divisors (see below), whose sum is σ = 32942564075520. Its totient is φ = 10562645237760.

The previous prime is 20021102010187. The next prime is 20021102010317. The reversal of 20021102010231 is 13201020112002.

It is a de Polignac number, because none of the positive numbers 2^k-20021102010231 is a prime.

It is a super-2 number, since 2×20021102010231² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20021102010231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021102010131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46189471 + ... + 46620911.

It is an arithmetic number, because the mean of its divisors is an integer number (514727563680).

Almost surely, 2^{20021102010231} is an apocalyptic number.

20021102010231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20021102010231 is a deficient number, since it is larger than the sum of its proper divisors (12921462065289).

20021102010231 is a wasteful number, since it uses less digits than its factorization.

20021102010231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434816.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20021102010231 its reverse (13201020112002), we get a palindrome (33222122122233).

The spelling of 20021102010231 in words is "twenty trillion, twenty-one billion, one hundred two million, ten thousand, two hundred thirty-one".