1231422222400 has 84 divisors (see below), whose sum is σ = 3037702286788. Its totient is φ = 491327907840.

The previous prime is 1231422222377. The next prime is 1231422222427. The reversal of 1231422222400 is 42222241321.

It can be written as a sum of positive squares in 6 ways, for example, as 101521253376 + 1129900969024 = 318624^2 + 1062968^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334119 + ... + 1604518.

Almost surely, 2^{1231422222400} is an apocalyptic number.

1231422222400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231422222400 is an abundant number, since it is smaller than the sum of its proper divisors (1806280064388).

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

1231422222400 is a wasteful number, since it uses less digits than its factorization.

1231422222400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939056 (or 1939041 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 1231422222400 its reverse (42222241321), we get a palindrome (1273644463721).

The spelling of 1231422222400 in words is "one trillion, two hundred thirty-one billion, four hundred twenty-two million, two hundred twenty-two thousand, four hundred".