1231451142420 has 48 divisors (see below), whose sum is σ = 3448115431488. Its totient is φ = 328381996800.

The previous prime is 1231451142419. The next prime is 1231451142451. The reversal of 1231451142420 is 242411541321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5598520 + ... + 5814320.

It is an arithmetic number, because the mean of its divisors is an integer number (71835738156).

Almost surely, 2^{1231451142420} is an apocalyptic number.

1231451142420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231451142420 is an abundant number, since it is smaller than the sum of its proper divisors (2216664289068).

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

1231451142420 is a wasteful number, since it uses less digits than its factorization.

1231451142420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310920 (or 310918 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 1231451142420 its reverse (242411541321), we get a palindrome (1473862683741).

The spelling of 1231451142420 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-one million, one hundred forty-two thousand, four hundred twenty".