20100333023021 has 4 divisors (see below), whose sum is σ = 20100570159612. Its totient is φ = 20100095886432.

The previous prime is 20100333023009. The next prime is 20100333023027. The reversal of 20100333023021 is 12032033300102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9102228660100 + 10998104362921 = 3016990^2 + 3316339^2 .

It is a cyclic number.

It is not a de Polignac number, because 20100333023021 - 2⁴² = 15702286511917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100333022984 and 20100333023002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100333023027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118441106 + ... + 118610691.

It is an arithmetic number, because the mean of its divisors is an integer number (5025142539903).

Almost surely, 2^{20100333023021} is an apocalyptic number.

It is an amenable number.

20100333023021 is a deficient number, since it is larger than the sum of its proper divisors (237136591).

20100333023021 is an equidigital number, since it uses as much as digits as its factorization.

20100333023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237136590.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20100333023021 its reverse (12032033300102), we get a palindrome (32132366323123).

The spelling of 20100333023021 in words is "twenty trillion, one hundred billion, three hundred thirty-three million, twenty-three thousand, twenty-one".