1123212112302 has 128 divisors (see below), whose sum is σ = 2657642296320. Its totient is φ = 309818234880.

The previous prime is 1123212112301. The next prime is 1123212112307. The reversal of 1123212112302 is 2032112123211.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123212112301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 82868758 + ... + 82882310.

It is an arithmetic number, because the mean of its divisors is an integer number (20762830440).

Almost surely, 2^{1123212112302} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123212112302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1328821148160).

1123212112302 is an abundant number, since it is smaller than the sum of its proper divisors (1534430184018).

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

1123212112302 is a wasteful number, since it uses less digits than its factorization.

1123212112302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14138.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1123212112302 its reverse (2032112123211), we get a palindrome (3155324235513).

The spelling of 1123212112302 in words is "one trillion, one hundred twenty-three billion, two hundred twelve million, one hundred twelve thousand, three hundred two".