1220211110005 has 16 divisors (see below), whose sum is σ = 1484575032240. Its totient is φ = 962625835008.

The previous prime is 1220211109993. The next prime is 1220211110009. The reversal of 1220211110005 is 5000111120221.

It can be written as a sum of positive squares in 8 ways, for example, as 2611414404 + 1217599695601 = 51102^2 + 1103449^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220211110005 - 2¹⁹ = 1220210585717 is a prime.

It is a super-2 number, since 2×1220211110005² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220211110009) 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, 1782669 + ... + 2370301.

It is an arithmetic number, because the mean of its divisors is an integer number (92785939515).

Almost surely, 2^{1220211110005} is an apocalyptic number.

It is an amenable number.

1220211110005 is a deficient number, since it is larger than the sum of its proper divisors (264363922235).

1220211110005 is an equidigital number, since it uses as much as digits as its factorization.

1220211110005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593400.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 1220211110005 its reverse (5000111120221), we get a palindrome (6220322230226).

The spelling of 1220211110005 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred ten thousand, five".