1231422401144 has 64 divisors (see below), whose sum is σ = 2633760360000. Its totient is φ = 534719821824.

The previous prime is 1231422401107. The next prime is 1231422401189. The reversal of 1231422401144 is 4411042241321.

It is a super-2 number, since 2×1231422401144² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4733549 + ... + 4986915.

It is an arithmetic number, because the mean of its divisors is an integer number (41152505625).

Almost surely, 2^{1231422401144} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231422401144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1316880180000).

1231422401144 is an abundant number, since it is smaller than the sum of its proper divisors (1402337958856).

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

1231422401144 is a wasteful number, since it uses less digits than its factorization.

1231422401144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256152 (or 256148 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 1231422401144 its reverse (4411042241321), we get a palindrome (5642464642465).

The spelling of 1231422401144 in words is "one trillion, two hundred thirty-one billion, four hundred twenty-two million, four hundred one thousand, one hundred forty-four".