1221110012210 has 64 divisors (see below), whose sum is σ = 2403841224960. Its totient is φ = 442925690880.

The previous prime is 1221110012197. The next prime is 1221110012219. The reversal of 1221110012210 is 122100111221.

It is a super-2 number, since 2×1221110012210² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221110012219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73230434 + ... + 73247106.

It is an arithmetic number, because the mean of its divisors is an integer number (37560019140).

Almost surely, 2^{1221110012210} is an apocalyptic number.

1221110012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221110012210 is a deficient number, since it is larger than the sum of its proper divisors (1182731212750).

1221110012210 is a wasteful number, since it uses less digits than its factorization.

1221110012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18323.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221110012210 its reverse (122100111221), we get a palindrome (1343210123431).

The spelling of 1221110012210 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, twelve thousand, two hundred ten".