1222121101012 has 144 divisors (see below), whose sum is σ = 2631268708992. Its totient is φ = 486195240960.

The previous prime is 1222121101007. The next prime is 1222121101039. The reversal of 1222121101012 is 2101011212221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117202143 + ... + 117212569.

It is an arithmetic number, because the mean of its divisors is an integer number (18272699368).

Almost surely, 2^{1222121101012} 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 1222121101012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1315634354496).

1222121101012 is an abundant number, since it is smaller than the sum of its proper divisors (1409147607980).

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

1222121101012 is a wasteful number, since it uses less digits than its factorization.

1222121101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10718 (or 10693 counting only the distinct ones).

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

Adding to 1222121101012 its reverse (2101011212221), we get a palindrome (3323132313233).

The spelling of 1222121101012 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred one thousand, twelve".