1223531551212 has 48 divisors (see below), whose sum is σ = 2918179955712. Its totient is φ = 398819911680.

The previous prime is 1223531551129. The next prime is 1223531551219. The reversal of 1223531551212 is 2121551353221.

It is a super-2 number, since 2×1223531551212² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1223531551219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290464 + ... + 1591047.

It is an arithmetic number, because the mean of its divisors is an integer number (60795415744).

Almost surely, 2^{1223531551212} is an apocalyptic number.

1223531551212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1223531551212 is an abundant number, since it is smaller than the sum of its proper divisors (1694648404500).

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

1223531551212 is a wasteful number, since it uses less digits than its factorization.

1223531551212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882718 (or 1882716 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

The spelling of 1223531551212 in words is "one trillion, two hundred twenty-three billion, five hundred thirty-one million, five hundred fifty-one thousand, two hundred twelve".