1221123112302 has 32 divisors (see below), whose sum is σ = 2500540859520. Its totient is φ = 397336615200.

The previous prime is 1221123112241. The next prime is 1221123112381. The reversal of 1221123112302 is 2032113211221.

It is a super-2 number, since 2×1221123112302² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 987324 + ... + 1848527.

It is an arithmetic number, because the mean of its divisors is an integer number (78141901860).

Almost surely, 2^{1221123112302} is an apocalyptic number.

1221123112302 is an abundant number, since it is smaller than the sum of its proper divisors (1279417747218).

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

1221123112302 is a wasteful number, since it uses less digits than its factorization.

1221123112302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837568.

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

Adding to 1221123112302 its reverse (2032113211221), we get a palindrome (3253236323523).

The spelling of 1221123112302 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-three million, one hundred twelve thousand, three hundred two".