1212216464 has 10 divisors (see below), whose sum is σ = 2348669430. Its totient is φ = 606108224.

The previous prime is 1212216457. The next prime is 1212216479. The reversal of 1212216464 is 4646122121.

It can be written as a sum of positive squares in only one way, i.e., 922944400 + 289272064 = 30380^2 + 17008^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37881749 + ... + 37881780.

It is an arithmetic number, because the mean of its divisors is an integer number (234866943).

Almost surely, 2^1212216464 is an apocalyptic number.

It is an amenable number.

1212216464 is a deficient number, since it is larger than the sum of its proper divisors (1136452966).

1212216464 is an equidigital number, since it uses as much as digits as its factorization.

1212216464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75763537 (or 75763531 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 1212216464 is about 34816.8991152285. The cubic root of 1212216464 is about 1066.2524925005.

Adding to 1212216464 its reverse (4646122121), we get a palindrome (5858338585).

The spelling of 1212216464 in words is "one billion, two hundred twelve million, two hundred sixteen thousand, four hundred sixty-four".