21212020020011 has 8 divisors (see below), whose sum is σ = 21439701586464. Its totient is φ = 20984522146560.

The previous prime is 21212020019987. The next prime is 21212020020053. The reversal of 21212020020011 is 11002002021212.

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 21212020020011 - 2¹⁴ = 21212020003627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212020020071) 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, 45691055 + ... + 46152968.

It is an arithmetic number, because the mean of its divisors is an integer number (2679962698308).

Almost surely, 2^{21212020020011} is an apocalyptic number.

21212020020011 is a deficient number, since it is larger than the sum of its proper divisors (227681566453).

21212020020011 is an equidigital number, since it uses as much as digits as its factorization.

21212020020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91846501.

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

Adding to 21212020020011 its reverse (11002002021212), we get a palindrome (32214022041223).

The spelling of 21212020020011 in words is "twenty-one trillion, two hundred twelve billion, twenty million, twenty thousand, eleven".