21220212201011 has 4 divisors (see below), whose sum is σ = 21308999700000. Its totient is φ = 21131424702024.

The previous prime is 21220212200987. The next prime is 21220212201047. The reversal of 21220212201011 is 11010221202212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21220212201011 - 2⁶ = 21220212200947 is a prime.

It is a super-2 number, since 2×21220212201011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220212201091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44393749136 + ... + 44393749613.

It is an arithmetic number, because the mean of its divisors is an integer number (5327249925000).

Almost surely, 2^{21220212201011} is an apocalyptic number.

21220212201011 is a deficient number, since it is larger than the sum of its proper divisors (88787498989).

21220212201011 is an equidigital number, since it uses as much as digits as its factorization.

21220212201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88787498988.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21220212201011 its reverse (11010221202212), we get a palindrome (32230433403223).

The spelling of 21220212201011 in words is "twenty-one trillion, two hundred twenty billion, two hundred twelve million, two hundred one thousand, eleven".