21020013022011 has 8 divisors (see below), whose sum is σ = 28072404560400. Its totient is φ = 13990481749152.

The previous prime is 21020013022007. The next prime is 21020013022079. The reversal of 21020013022011 is 11022031002012.

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

It is not a de Polignac number, because 21020013022011 - 2² = 21020013022007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21020013026011) 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, 5715064236 + ... + 5715067913.

It is an arithmetic number, because the mean of its divisors is an integer number (3509050570050).

Almost surely, 2^{21020013022011} is an apocalyptic number.

21020013022011 is a deficient number, since it is larger than the sum of its proper divisors (7052391538389).

21020013022011 is a wasteful number, since it uses less digits than its factorization.

21020013022011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11430132765.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21020013022011 its reverse (11022031002012), we get a palindrome (32042044024023).

The spelling of 21020013022011 in words is "twenty-one trillion, twenty billion, thirteen million, twenty-two thousand, eleven".