20110102222021 has 6 divisors (see below), whose sum is σ = 23393384217510. Its totient is φ = 17237230475976.

The previous prime is 20110102221997. The next prime is 20110102222031. The reversal of 20110102222021 is 12022220101102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16502191919521 + 3607910302500 = 4062289^2 + 1899450^2 .

It is not a de Polignac number, because 20110102222021 - 2¹¹ = 20110102219973 is a prime.

It is a super-2 number, since 2×20110102222021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110102221986 and 20110102222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110102222031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 205205124666 + ... + 205205124763.

It is an arithmetic number, because the mean of its divisors is an integer number (3898897369585).

Almost surely, 2^{20110102222021} is an apocalyptic number.

It is an amenable number.

20110102222021 is a deficient number, since it is larger than the sum of its proper divisors (3283281995489).

20110102222021 is an equidigital number, since it uses as much as digits as its factorization.

20110102222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410410249443 (or 410410249436 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20110102222021 its reverse (12022220101102), we get a palindrome (32132322323123).

The spelling of 20110102222021 in words is "twenty trillion, one hundred ten billion, one hundred two million, two hundred twenty-two thousand, twenty-one".