1221110102212 has 192 divisors, whose sum is σ = 3021702082560. Its totient is φ = 415838707200.

The previous prime is 1221110102209. The next prime is 1221110102213. The reversal of 1221110102212 is 2122010111221.

It is a super-2 number, since 2×1221110102212² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221110102213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 286576162 + ... + 286580422.

It is an arithmetic number, because the mean of its divisors is an integer number (15738031680).

Almost surely, 2^{1221110102212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221110102212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1510851041280).

1221110102212 is an abundant number, since it is smaller than the sum of its proper divisors (1800591980348).

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

1221110102212 is a wasteful number, since it uses less digits than its factorization.

1221110102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8082 (or 8080 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1221110102212 its reverse (2122010111221), we get a palindrome (3343120213433).

Subtracting 1221110102212 from its reverse (2122010111221), we obtain a palindrome (900900009009).

The spelling of 1221110102212 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, one hundred two thousand, two hundred twelve".