21220303011 has 16 divisors (see below), whose sum is σ = 29325040800. Its totient is φ = 13638233088.

The previous prime is 21220302973. The next prime is 21220303037. The reversal of 21220303011 is 11030302212.

It is not a de Polignac number, because 21220303011 - 2¹⁸ = 21220040867 is a prime.

It is a super-2 number, since 2×21220303011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21220373011) 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, 864846 + ... + 889043.

It is an arithmetic number, because the mean of its divisors is an integer number (1832815050).

Almost surely, 2^21220303011 is an apocalyptic number.

21220303011 is a deficient number, since it is larger than the sum of its proper divisors (8104737789).

21220303011 is a wasteful number, since it uses less digits than its factorization.

21220303011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754038.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21220303011 its reverse (11030302212), we get a palindrome (32250605223).

The spelling of 21220303011 in words is "twenty-one billion, two hundred twenty million, three hundred three thousand, eleven".