20001211320 has 32 divisors (see below), whose sum is σ = 60003634320. Its totient is φ = 5333656320.

The previous prime is 20001211319. The next prime is 20001211339. The reversal of 20001211320 is 2311210002.

It is a super-2 number, since 2×20001211320² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20001211296 and 20001211305.

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, 83338261 + ... + 83338500.

Almost surely, 2^20001211320 is an apocalyptic number.

20001211320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001211320 is an abundant number, since it is smaller than the sum of its proper divisors (40002423000).

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

20001211320 is a wasteful number, since it uses less digits than its factorization.

20001211320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166676775 (or 166676771 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20001211320 its reverse (2311210002), we get a palindrome (22312421322).

The spelling of 20001211320 in words is "twenty billion, one million, two hundred eleven thousand, three hundred twenty".