1221002102210 has 32 divisors (see below), whose sum is σ = 2407894324992. Its totient is φ = 442095172480.

The previous prime is 1221002102179. The next prime is 1221002102219. The reversal of 1221002102210 is 122012001221.

It is a super-2 number, since 2×1221002102210² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221002102219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23794154 + ... + 23845413.

It is an arithmetic number, because the mean of its divisors is an integer number (75246697656).

Almost surely, 2^{1221002102210} is an apocalyptic number.

1221002102210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221002102210 is a deficient number, since it is larger than the sum of its proper divisors (1186892222782).

1221002102210 is a wasteful number, since it uses less digits than its factorization.

1221002102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47639818.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221002102210 its reverse (122012001221), we get a palindrome (1343014103431).

The spelling of 1221002102210 in words is "one trillion, two hundred twenty-one billion, two million, one hundred two thousand, two hundred ten".