21101021002101 has 8 divisors (see below), whose sum is σ = 28135028700160. Its totient is φ = 14067180319392.

The previous prime is 21101021002097. The next prime is 21101021002147. The reversal of 21101021002101 is 10120012010112.

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

It is not a de Polignac number, because 21101021002101 - 2² = 21101021002097 is a prime.

It is a super-2 number, since 2×21101021002101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101021012101) 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, 41458741 + ... + 41964618.

It is an arithmetic number, because the mean of its divisors is an integer number (3516878587520).

Almost surely, 2^{21101021002101} is an apocalyptic number.

It is an amenable number.

21101021002101 is a deficient number, since it is larger than the sum of its proper divisors (7034007698059).

21101021002101 is an equidigital number, since it uses as much as digits as its factorization.

21101021002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83507675.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21101021002101 its reverse (10120012010112), we get a palindrome (31221033012213).

The spelling of 21101021002101 in words is "twenty-one trillion, one hundred one billion, twenty-one million, two thousand, one hundred one".