21101002011001 has 8 divisors (see below), whose sum is σ = 23058490047264. Its totient is φ = 19150049829120.

The previous prime is 21101002010983. The next prime is 21101002011053. The reversal of 21101002011001 is 10011020010112.

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 21101002011001 - 2⁷ = 21101002010873 is a prime.

It is a super-2 number, since 2×21101002011001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101002041001) 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, 1633956840 + ... + 1633969753.

It is an arithmetic number, because the mean of its divisors is an integer number (2882311255908).

Almost surely, 2^{21101002011001} is an apocalyptic number.

It is an amenable number.

21101002011001 is a deficient number, since it is larger than the sum of its proper divisors (1957488036263).

21101002011001 is a wasteful number, since it uses less digits than its factorization.

21101002011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267927191.

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

Adding to 21101002011001 its reverse (10011020010112), we get a palindrome (31112022021113).

The spelling of 21101002011001 in words is "twenty-one trillion, one hundred one billion, two million, eleven thousand, one".