142221421320 has 256 divisors, whose sum is σ = 495598694400. Its totient is φ = 32267612160.

The previous prime is 142221421313. The next prime is 142221421351. The reversal of 142221421320 is 23124122241.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3999057 + ... + 4034463.

It is an arithmetic number, because the mean of its divisors is an integer number (1935932400).

Almost surely, 2^142221421320 is an apocalyptic number.

142221421320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142221421320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247799347200).

142221421320 is an abundant number, since it is smaller than the sum of its proper divisors (353377273080).

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

142221421320 is a wasteful number, since it uses less digits than its factorization.

142221421320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35628 (or 35624 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 142221421320 its reverse (23124122241), we get a palindrome (165345543561).

The spelling of 142221421320 in words is "one hundred forty-two billion, two hundred twenty-one million, four hundred twenty-one thousand, three hundred twenty".