221020120021011 has 16 divisors (see below), whose sum is σ = 294903463411200. Its totient is φ = 147241763681760.

The previous prime is 221020120021007. The next prime is 221020120021109. The reversal of 221020120021011 is 110120021020122.

It is not a de Polignac number, because 221020120021011 - 2² = 221020120021007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221020120022011) 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, 610204840 + ... + 610566938.

It is an arithmetic number, because the mean of its divisors is an integer number (18431466463200).

Almost surely, 2^{221020120021011} is an apocalyptic number.

221020120021011 is a deficient number, since it is larger than the sum of its proper divisors (73883343390189).

221020120021011 is a wasteful number, since it uses less digits than its factorization.

221020120021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506506.

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

Adding to 221020120021011 its reverse (110120021020122), we get a palindrome (331140141041133).

The spelling of 221020120021011 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty million, twenty-one thousand, eleven".