21012201022101 has 8 divisors (see below), whose sum is σ = 28017316531680. Its totient is φ = 14007609763632.

The previous prime is 21012201022061. The next prime is 21012201022157. The reversal of 21012201022101 is 10122010221012.

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

It is not a de Polignac number, because 21012201022101 - 2⁹ = 21012201021589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012201022181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130969246 + ... + 131129583.

It is an arithmetic number, because the mean of its divisors is an integer number (3502164566460).

Almost surely, 2^{21012201022101} is an apocalyptic number.

It is an amenable number.

21012201022101 is a deficient number, since it is larger than the sum of its proper divisors (7005115509579).

21012201022101 is a wasteful number, since it uses less digits than its factorization.

21012201022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262125555.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21012201022101 its reverse (10122010221012), we get a palindrome (31134211243113).

It can be divided in two parts, 2 and 1012201022101, that multiplied together give a palindrome (2024402044202).

The spelling of 21012201022101 in words is "twenty-one trillion, twelve billion, two hundred one million, twenty-two thousand, one hundred one".