1210221100011 has 32 divisors (see below), whose sum is σ = 2117680128000. Its totient is φ = 595597531680.

The previous prime is 1210221099953. The next prime is 1210221100027. The reversal of 1210221100011 is 1100011220121.

It is not a de Polignac number, because 1210221100011 - 2⁹ = 1210221099499 is a prime.

It is a super-2 number, since 2×1210221100011² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1210221100011.

It is not an unprimeable number, because it can be changed into a prime (1210221100091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137865411 + ... + 137874188.

It is an arithmetic number, because the mean of its divisors is an integer number (66177504000).

Almost surely, 2^{1210221100011} is an apocalyptic number.

1210221100011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1210221100011 is a deficient number, since it is larger than the sum of its proper divisors (907459027989).

1210221100011 is a wasteful number, since it uses less digits than its factorization.

1210221100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275739639.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1210221100011 its reverse (1100011220121), we get a palindrome (2310232320132).

The spelling of 1210221100011 in words is "one trillion, two hundred ten billion, two hundred twenty-one million, one hundred thousand, eleven".