1220231422144 has 28 divisors (see below), whose sum is σ = 2767310547664. Its totient is φ = 522956323584.

The previous prime is 1220231422141. The next prime is 1220231422169. The reversal of 1220231422144 is 4412241320221.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1220231422141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1361864979 + ... + 1361865874.

Almost surely, 2^{1220231422144} is an apocalyptic number.

1220231422144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1220231422144 is an abundant number, since it is smaller than the sum of its proper divisors (1547079125520).

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

1220231422144 is an equidigital number, since it uses as much as digits as its factorization.

1220231422144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723730872 (or 2723730862 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 1220231422144 its reverse (4412241320221), we get a palindrome (5632472742365).

The spelling of 1220231422144 in words is "one trillion, two hundred twenty billion, two hundred thirty-one million, four hundred twenty-two thousand, one hundred forty-four".