21220222012011 has 40 divisors (see below), whose sum is σ = 34594092175104. Its totient is φ = 12855909757680.

The previous prime is 21220222012007. The next prime is 21220222012037. The reversal of 21220222012011 is 11021022202212.

It is a happy number.

21220222012011 is a `hidden beast` number, since 21 + 220 + 2 + 220 + 1 + 201 + 1 = 666.

It is not a de Polignac number, because 21220222012011 - 2² = 21220222012007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220222012111) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2098951 + ... + 6844416.

Almost surely, 2^{21220222012011} is an apocalyptic number.

21220222012011 is a deficient number, since it is larger than the sum of its proper divisors (13373870163093).

21220222012011 is a wasteful number, since it uses less digits than its factorization.

21220222012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8946053 (or 8946044 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21220222012011 its reverse (11021022202212), we get a palindrome (32241244214223).

The spelling of 21220222012011 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, twelve thousand, eleven".