20211111011001 has 8 divisors (see below), whose sum is σ = 26961085204000. Its totient is φ = 13467605412672.

The previous prime is 20211111010999. The next prime is 20211111011009. The reversal of 20211111011001 is 10011011111202.

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

It is not a de Polignac number, because 20211111011001 - 2¹ = 20211111010999 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20211111011009) 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, 1617141376 + ... + 1617153873.

It is an arithmetic number, because the mean of its divisors is an integer number (3370135650500).

Almost surely, 2^{20211111011001} is an apocalyptic number.

It is an amenable number.

20211111011001 is a deficient number, since it is larger than the sum of its proper divisors (6749974192999).

20211111011001 is a wasteful number, since it uses less digits than its factorization.

20211111011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234297335.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 20211111011001 its reverse (10011011111202), we get a palindrome (30222122122203).

The spelling of 20211111011001 in words is "twenty trillion, two hundred eleven billion, one hundred eleven million, eleven thousand, one".