1123212220002 has 24 divisors (see below), whose sum is σ = 2473521995100. Its totient is φ = 368266301280.

The previous prime is 1123212219977. The next prime is 1123212220007. The reversal of 1123212220002 is 2000222123211.

It can be written as a sum of positive squares in 2 ways, for example, as 1075993364601 + 47218855401 = 1037301^2 + 217299^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1123212220007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 511479877 + ... + 511482072.

Almost surely, 2^{1123212220002} is an apocalyptic number.

1123212220002 is an abundant number, since it is smaller than the sum of its proper divisors (1350309775098).

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

1123212220002 is a wasteful number, since it uses less digits than its factorization.

1123212220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022962018 (or 1022962015 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1123212220002 its reverse (2000222123211), we get a palindrome (3123434343213).

The spelling of 1123212220002 in words is "one trillion, one hundred twenty-three billion, two hundred twelve million, two hundred twenty thousand, two".