21021210023101 has 8 divisors (see below), whose sum is σ = 21045319747200. Its totient is φ = 20997101225328.

The previous prime is 21021210023059. The next prime is 21021210023137. The reversal of 21021210023101 is 10132001212012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21021210023101 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 (21021210023141) 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, 51889075 + ... + 52292623.

It is an arithmetic number, because the mean of its divisors is an integer number (2630664968400).

Almost surely, 2^{21021210023101} is an apocalyptic number.

It is an amenable number.

21021210023101 is a deficient number, since it is larger than the sum of its proper divisors (24109724099).

21021210023101 is an equidigital number, since it uses as much as digits as its factorization.

21021210023101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463163.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21021210023101 its reverse (10132001212012), we get a palindrome (31153211235113).

The spelling of 21021210023101 in words is "twenty-one trillion, twenty-one billion, two hundred ten million, twenty-three thousand, one hundred one".