20001221302 has 16 divisors (see below), whose sum is σ = 32176744560. Its totient is φ = 9295502112.

The previous prime is 20001221299. The next prime is 20001221311. The reversal of 20001221302 is 20312210002.

It is a congruent number.

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, 4963533 + ... + 4967560.

It is an arithmetic number, because the mean of its divisors is an integer number (2011046535).

Almost surely, 2^20001221302 is an apocalyptic number.

20001221302 is a deficient number, since it is larger than the sum of its proper divisors (12175523258).

20001221302 is a wasteful number, since it uses less digits than its factorization.

20001221302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9931167.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20001221302 its reverse (20312210002), we get a palindrome (40313431304).

The spelling of 20001221302 in words is "twenty billion, one million, two hundred twenty-one thousand, three hundred two".