1221002212010 has 96 divisors (see below), whose sum is σ = 2707473807360. Its totient is φ = 393937893888.

The previous prime is 1221002212007. The next prime is 1221002212033. The reversal of 1221002212010 is 102122001221.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 83950799 + ... + 83965341.

It is an arithmetic number, because the mean of its divisors is an integer number (28202852160).

Almost surely, 2^{1221002212010} is an apocalyptic number.

1221002212010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221002212010 is an abundant number, since it is smaller than the sum of its proper divisors (1486471595350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221002212010 is a wasteful number, since it uses less digits than its factorization.

1221002212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24660 (or 24653 counting only the distinct ones).

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

Adding to 1221002212010 its reverse (102122001221), we get a palindrome (1323124213231).

The spelling of 1221002212010 in words is "one trillion, two hundred twenty-one billion, two million, two hundred twelve thousand, ten".