21027304022101 has 4 divisors (see below), whose sum is σ = 22644788946892. Its totient is φ = 19409819097312.

The previous prime is 21027304022099. The next prime is 21027304022161. The reversal of 21027304022101 is 10122040372012.

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 12564004841476 + 8463299180625 = 3544574^2 + 2909175^2 .

It is a cyclic number.

It is not a de Polignac number, because 21027304022101 - 2¹ = 21027304022099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21027304022161) 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, 808742462376 + ... + 808742462401.

It is an arithmetic number, because the mean of its divisors is an integer number (5661197236723).

Almost surely, 2^{21027304022101} is an apocalyptic number.

It is an amenable number.

21027304022101 is a deficient number, since it is larger than the sum of its proper divisors (1617484924791).

21027304022101 is a wasteful number, since it uses less digits than its factorization.

21027304022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617484924790.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 21027304022101 its reverse (10122040372012), we get a palindrome (31149344394113).

The spelling of 21027304022101 in words is "twenty-one trillion, twenty-seven billion, three hundred four million, twenty-two thousand, one hundred one".