21011101220001 has 8 divisors (see below), whose sum is σ = 28016736542080. Its totient is φ = 14006433355632.

The previous prime is 21011101219991. The next prime is 21011101220059. The reversal of 21011101220001 is 10002210111012.

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

It is not a de Polignac number, because 21011101220001 - 2⁹ = 21011101219489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011801220001) 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, 241813750 + ... + 241900623.

It is an arithmetic number, because the mean of its divisors is an integer number (3502092067760).

Almost surely, 2^{21011101220001} is an apocalyptic number.

It is an amenable number.

21011101220001 is a deficient number, since it is larger than the sum of its proper divisors (7005635322079).

21011101220001 is a wasteful number, since it uses less digits than its factorization.

21011101220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483728855.

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

Adding to 21011101220001 its reverse (10002210111012), we get a palindrome (31013311331013).

The spelling of 21011101220001 in words is "twenty-one trillion, eleven billion, one hundred one million, two hundred twenty thousand, one".