142212021320 has 32 divisors (see below), whose sum is σ = 323572303800. Its totient is φ = 56245651968.

The previous prime is 142212021317. The next prime is 142212021331. The reversal of 142212021320 is 23120212241.

It can be written as a sum of positive squares in 4 ways, for example, as 114781374436 + 27430646884 = 338794^2 + 165622^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 142212021292 and 142212021301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19970039 + ... + 19977158.

Almost surely, 2^142212021320 is an apocalyptic number.

142212021320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142212021320 is an abundant number, since it is smaller than the sum of its proper divisors (181360282480).

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

142212021320 is a wasteful number, since it uses less digits than its factorization.

142212021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39947297 (or 39947293 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 142212021320 its reverse (23120212241), we get a palindrome (165332233561).

The spelling of 142212021320 in words is "one hundred forty-two billion, two hundred twelve million, twenty-one thousand, three hundred twenty".