1210221100005 has 32 divisors (see below), whose sum is σ = 1983816696960. Its totient is φ = 629634001920.

The previous prime is 1210221099953. The next prime is 1210221100027. The reversal of 1210221100005 is 5000011220121.

It is not a de Polignac number, because 1210221100005 - 2⁷ = 1210221099877 is a prime.

It is a super-2 number, since 2×1210221100005² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5287009 + ... + 5511161.

It is an arithmetic number, because the mean of its divisors is an integer number (61994271780).

Almost surely, 2^{1210221100005} is an apocalyptic number.

1210221100005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1210221100005 is a deficient number, since it is larger than the sum of its proper divisors (773595596955).

1210221100005 is a wasteful number, since it uses less digits than its factorization.

1210221100005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232981.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 1210221100005 its reverse (5000011220121), we get a palindrome (6210232320126).

The spelling of 1210221100005 in words is "one trillion, two hundred ten billion, two hundred twenty-one million, one hundred thousand, five".