1221102210012 has 48 divisors (see below), whose sum is σ = 2918900353824. Its totient is φ = 397083520000.

The previous prime is 1221102210007. The next prime is 1221102210017. The reversal of 1221102210012 is 2100122011221.

It is an interprime number because it is at equal distance from previous prime (1221102210007) and next prime (1221102210017).

It is a junction number, because it is equal to n+sod(n) for n = 1221102209973 and 1221102210000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221102210017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9877462 + ... + 10000322.

It is an arithmetic number, because the mean of its divisors is an integer number (60810424038).

Almost surely, 2^{1221102210012} is an apocalyptic number.

1221102210012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221102210012 is an abundant number, since it is smaller than the sum of its proper divisors (1697798143812).

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

1221102210012 is a wasteful number, since it uses less digits than its factorization.

1221102210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143110 (or 143108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221102210012 its reverse (2100122011221), we get a palindrome (3321224221233).

The spelling of 1221102210012 in words is "one trillion, two hundred twenty-one billion, one hundred two million, two hundred ten thousand, twelve".