21102011001001 has 8 divisors (see below), whose sum is σ = 24119936843904. Its totient is φ = 18084923368800.

The previous prime is 21102011000957. The next prime is 21102011001023. The reversal of 21102011001001 is 10010011020112.

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 21102011001001 - 2²⁵ = 21101977446569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102011001061) 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, 209498725 + ... + 209599426.

It is an arithmetic number, because the mean of its divisors is an integer number (3014992105488).

Almost surely, 2^{21102011001001} is an apocalyptic number.

It is an amenable number.

21102011001001 is a deficient number, since it is larger than the sum of its proper divisors (3017925842903).

21102011001001 is an equidigital number, since it uses as much as digits as its factorization.

21102011001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419105351.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21102011001001 its reverse (10010011020112), we get a palindrome (31112022021113).

The spelling of 21102011001001 in words is "twenty-one trillion, one hundred two billion, eleven million, one thousand, one".