21020012022011 has 8 divisors (see below), whose sum is σ = 21960135471600. Its totient is φ = 20094241602400.

The previous prime is 21020012022007. The next prime is 21020012022017. The reversal of 21020012022011 is 11022021002012.

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 21020012022011 - 2² = 21020012022007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020012022017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3588254501 + ... + 3588260358.

It is an arithmetic number, because the mean of its divisors is an integer number (2745016933950).

Almost surely, 2^{21020012022011} is an apocalyptic number.

21020012022011 is a deficient number, since it is larger than the sum of its proper divisors (940123449589).

21020012022011 is a wasteful number, since it uses less digits than its factorization.

21020012022011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7176514989.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21020012022011 its reverse (11022021002012), we get a palindrome (32042033024023).

The spelling of 21020012022011 in words is "twenty-one trillion, twenty billion, twelve million, twenty-two thousand, eleven".