1220212144 has 10 divisors (see below), whose sum is σ = 2364161060. Its totient is φ = 610106064.

The previous prime is 1220212121. The next prime is 1220212171. The reversal of 1220212144 is 4412120221.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38131614 + ... + 38131645.

It is an arithmetic number, because the mean of its divisors is an integer number (236416106).

Almost surely, 2^1220212144 is an apocalyptic number.

It is an amenable number.

1220212144 is a deficient number, since it is larger than the sum of its proper divisors (1143948916).

1220212144 is an equidigital number, since it uses as much as digits as its factorization.

1220212144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76263267 (or 76263261 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1220212144 is about 34931.5350936657. The cubic root of 1220212144 is about 1068.5916615787.

Adding to 1220212144 its reverse (4412120221), we get a palindrome (5632332365).

The spelling of 1220212144 in words is "one billion, two hundred twenty million, two hundred twelve thousand, one hundred forty-four".