21212020201011 has 32 divisors (see below), whose sum is σ = 28794587727360. Its totient is φ = 13886781232896.

The previous prime is 21212020201003. The next prime is 21212020201049. The reversal of 21212020201011 is 11010202021212.

It is not a de Polignac number, because 21212020201011 - 2³ = 21212020201003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212020201061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91604485 + ... + 91835753.

It is an arithmetic number, because the mean of its divisors is an integer number (899830866480).

Almost surely, 2^{21212020201011} is an apocalyptic number.

21212020201011 is a deficient number, since it is larger than the sum of its proper divisors (7582567526349).

21212020201011 is a wasteful number, since it uses less digits than its factorization.

21212020201011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232763.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21212020201011 its reverse (11010202021212), we get a palindrome (32222222222223).

The spelling of 21212020201011 in words is "twenty-one trillion, two hundred twelve billion, twenty million, two hundred one thousand, eleven".