220105552221 has 6 divisors (see below), whose sum is σ = 317930242110. Its totient is φ = 146737034808.

The previous prime is 220105552211. The next prime is 220105552229. The reversal of 220105552221 is 122255501022.

It is a happy number.

220105552221 is a `hidden beast` number, since 2 + 2 + 0 + 105 + 552 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 184458224196 + 35647328025 = 429486^2 + 188805^2 .

It is not a de Polignac number, because 220105552221 - 2⁵ = 220105552189 is a prime.

It is a super-2 number, since 2×220105552221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220105552229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12228086226 + ... + 12228086243.

It is an arithmetic number, because the mean of its divisors is an integer number (52988373685).

Almost surely, 2^220105552221 is an apocalyptic number.

It is an amenable number.

220105552221 is a deficient number, since it is larger than the sum of its proper divisors (97824689889).

220105552221 is a wasteful number, since it uses less digits than its factorization.

220105552221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24456172475 (or 24456172472 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 220105552221 in words is "two hundred twenty billion, one hundred five million, five hundred fifty-two thousand, two hundred twenty-one".