20310142221 has 12 divisors (see below), whose sum is σ = 29440539648. Its totient is φ = 13492248264.

The previous prime is 20310142219. The next prime is 20310142253. The reversal of 20310142221 is 12224101302.

It is a happy number.

It is not a de Polignac number, because 20310142221 - 2¹ = 20310142219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20310142194 and 20310142203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310142261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3984525 + ... + 3989618.

It is an arithmetic number, because the mean of its divisors is an integer number (2453378304).

Almost surely, 2^20310142221 is an apocalyptic number.

It is an amenable number.

20310142221 is a deficient number, since it is larger than the sum of its proper divisors (9130397427).

20310142221 is a wasteful number, since it uses less digits than its factorization.

20310142221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7974432 (or 7974429 counting only the distinct ones).

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

Adding to 20310142221 its reverse (12224101302), we get a palindrome (32534243523).

The spelling of 20310142221 in words is "twenty billion, three hundred ten million, one hundred forty-two thousand, two hundred twenty-one".