20321212110 has 16 divisors (see below), whose sum is σ = 48770909136. Its totient is φ = 5418989888.

The previous prime is 20321212081. The next prime is 20321212127. The reversal of 20321212110 is 1121212302.

It is a super-2 number, since 2×20321212110² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20321212110.

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, 338686839 + ... + 338686898.

It is an arithmetic number, because the mean of its divisors is an integer number (3048181821).

Almost surely, 2^20321212110 is an apocalyptic number.

20321212110 is an abundant number, since it is smaller than the sum of its proper divisors (28449697026).

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

20321212110 is a wasteful number, since it uses less digits than its factorization.

20321212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677373747.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20321212110 its reverse (1121212302), we get a palindrome (21442424412).

The spelling of 20321212110 in words is "twenty billion, three hundred twenty-one million, two hundred twelve thousand, one hundred ten".