21203230340101 has 8 divisors (see below), whose sum is σ = 21276152092440. Its totient is φ = 21130312369152.

The previous prime is 21203230340009. The next prime is 21203230340167. The reversal of 21203230340101 is 10104303230212.

It can be written as a sum of positive squares in 4 ways, for example, as 12114506748100 + 9088723592001 = 3480590^2 + 3014751^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21203230340101 - 2⁴¹ = 19004207084549 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 (21203230341101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10527421 + ... + 12378733.

It is an arithmetic number, because the mean of its divisors is an integer number (2659519011555).

Almost surely, 2^{21203230340101} is an apocalyptic number.

It is an amenable number.

21203230340101 is a deficient number, since it is larger than the sum of its proper divisors (72921752339).

21203230340101 is a wasteful number, since it uses less digits than its factorization.

21203230340101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890695.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21203230340101 its reverse (10104303230212), we get a palindrome (31307533570313).

The spelling of 21203230340101 in words is "twenty-one trillion, two hundred three billion, two hundred thirty million, three hundred forty thousand, one hundred one".