1220312331212 has 24 divisors (see below), whose sum is σ = 2325660069600. Its totient is φ = 556892747136.

The previous prime is 1220312331157. The next prime is 1220312331229. The reversal of 1220312331212 is 2121332130221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131835512 + ... + 131844767.

It is an arithmetic number, because the mean of its divisors is an integer number (96902502900).

Almost surely, 2^{1220312331212} is an apocalyptic number.

It is an amenable number.

1220312331212 is a deficient number, since it is larger than the sum of its proper divisors (1105347738388).

1220312331212 is a wasteful number, since it uses less digits than its factorization.

1220312331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263680385 (or 263680383 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1220312331212 its reverse (2121332130221), we get a palindrome (3341644461433).

The spelling of 1220312331212 in words is "one trillion, two hundred twenty billion, three hundred twelve million, three hundred thirty-one thousand, two hundred twelve".