1212444881216 has 14 divisors (see below), whose sum is σ = 2405945311290. Its totient is φ = 606222440576.

The previous prime is 1212444881209. The next prime is 1212444881233. The reversal of 1212444881216 is 6121884442121.

It can be written as a sum of positive squares in only one way, i.e., 920525113600 + 291919767616 = 959440^2 + 540296^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9472225571 + ... + 9472225698.

Almost surely, 2^{1212444881216} is an apocalyptic number.

1212444881216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1212444881216 is a deficient number, since it is larger than the sum of its proper divisors (1193500430074).

1212444881216 is an equidigital number, since it uses as much as digits as its factorization.

1212444881216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18944451281 (or 18944451271 counting only the distinct ones).

The product of its digits is 196608, while the sum is 44.

The spelling of 1212444881216 in words is "one trillion, two hundred twelve billion, four hundred forty-four million, eight hundred eighty-one thousand, two hundred sixteen".