21202311320212 has 24 divisors (see below), whose sum is σ = 40477301212320. Its totient is φ = 9637375803360.

The previous prime is 21202311320159. The next prime is 21202311320213.

21202311320212 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202311320213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12233823 + ... + 13858969.

It is an arithmetic number, because the mean of its divisors is an integer number (1686554217180).

Almost surely, 2^{21202311320212} is an apocalyptic number.

21202311320212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21202311320212 is a deficient number, since it is larger than the sum of its proper divisors (19274989892108).

21202311320212 is a wasteful number, since it uses less digits than its factorization.

21202311320212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921671 (or 1921669 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

It can be divided in two parts, 2120231 and 1320212, that added together give a palindrome (3440443).

The spelling of 21202311320212 in words is "twenty-one trillion, two hundred two billion, three hundred eleven million, three hundred twenty thousand, two hundred twelve".