20130142221 has 96 divisors (see below), whose sum is σ = 36810910080. Its totient is φ = 10803082752.

The previous prime is 20130142181. The next prime is 20130142243. The reversal of 20130142221 is 12224103102.

It is a happy number.

It is not a de Polignac number, because 20130142221 - 2¹⁰ = 20130141197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20130142194 and 20130142203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130143221) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17924766 + ... + 17925888.

It is an arithmetic number, because the mean of its divisors is an integer number (383446980).

Almost surely, 2^20130142221 is an apocalyptic number.

20130142221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20130142221 is a deficient number, since it is larger than the sum of its proper divisors (16680767859).

20130142221 is a wasteful number, since it uses less digits than its factorization.

20130142221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960 (or 1947 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20130142221 its reverse (12224103102), we get a palindrome (32354245323).

The spelling of 20130142221 in words is "twenty billion, one hundred thirty million, one hundred forty-two thousand, two hundred twenty-one".