21022001021011 has 8 divisors (see below), whose sum is σ = 22188717562880. Its totient is φ = 19861314022728.

The previous prime is 21022001021003. The next prime is 21022001021041. The reversal of 21022001021011 is 11012010022012.

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 21022001021011 - 2³ = 21022001021003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022001020982 and 21022001021000.

It is not an unprimeable number, because it can be changed into a prime (21022001021041) 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, 1507378731 + ... + 1507392676.

It is an arithmetic number, because the mean of its divisors is an integer number (2773589695360).

Almost surely, 2^{21022001021011} is an apocalyptic number.

21022001021011 is a deficient number, since it is larger than the sum of its proper divisors (1166716541869).

21022001021011 is a wasteful number, since it uses less digits than its factorization.

21022001021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014771793.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21022001021011 its reverse (11012010022012), we get a palindrome (32034011043023).

The spelling of 21022001021011 in words is "twenty-one trillion, twenty-two billion, one million, twenty-one thousand, eleven".