1212120223320 has 128 divisors (see below), whose sum is σ = 3795043492800. Its totient is φ = 309324201984.

The previous prime is 1212120223273. The next prime is 1212120223357. The reversal of 1212120223320 is 233220212121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1147957 + ... + 1934436.

Almost surely, 2^{1212120223320} is an apocalyptic number.

1212120223320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212120223320 is an abundant number, since it is smaller than the sum of its proper divisors (2582923269480).

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

1212120223320 is a wasteful number, since it uses less digits than its factorization.

1212120223320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082549 (or 3082545 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1212120223320 its reverse (233220212121), we get a palindrome (1445340435441).

The spelling of 1212120223320 in words is "one trillion, two hundred twelve billion, one hundred twenty million, two hundred twenty-three thousand, three hundred twenty".