221022221221011 has 96 divisors (see below), whose sum is σ = 353189701555200. Its totient is φ = 122531811816960.

The previous prime is 221022221221003. The next prime is 221022221221027. The reversal of 221022221221011 is 110122122220122.

It is not a de Polignac number, because 221022221221011 - 2³ = 221022221221003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (221022221221511) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1571017591 + ... + 1571158271.

It is an arithmetic number, because the mean of its divisors is an integer number (3679059391200).

Almost surely, 2^{221022221221011} is an apocalyptic number.

221022221221011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221022221221011 is a deficient number, since it is larger than the sum of its proper divisors (132167480334189).

221022221221011 is a wasteful number, since it uses less digits than its factorization.

221022221221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143129 (or 143122 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221022221221011 its reverse (110122122220122), we get a palindrome (331144343441133).

The spelling of 221022221221011 in words is "two hundred twenty-one trillion, twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, eleven".