21001032001011 has 16 divisors (see below), whose sum is σ = 28281477525408. Its totient is φ = 13860665280000.

The previous prime is 21001032000961. The next prime is 21001032001043. The reversal of 21001032001011 is 11010023010012.

It is not a de Polignac number, because 21001032001011 - 2¹⁹ = 21001031476723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21001032001051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500166 + ... + 6500171.

It is an arithmetic number, because the mean of its divisors is an integer number (1767592345338).

Almost surely, 2^{21001032001011} is an apocalyptic number.

21001032001011 is a deficient number, since it is larger than the sum of its proper divisors (7280445524397).

21001032001011 is a wasteful number, since it uses less digits than its factorization.

21001032001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010342.

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

Adding to 21001032001011 its reverse (11010023010012), we get a palindrome (32011055011023).

The spelling of 21001032001011 in words is "twenty-one trillion, one billion, thirty-two million, one thousand, eleven".