21122310020212 has 12 divisors (see below), whose sum is σ = 37291157956836. Its totient is φ = 10467693461120.

The previous prime is 21122310020209. The next prime is 21122310020213. The reversal of 21122310020212 is 21202001322112.

It can be written as a sum of positive squares in 2 ways, for example, as 2774503187856 + 18347806832356 = 1665684^2 + 4283434^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21122310020212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122310020213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23365386739 + ... + 23365387642.

It is an arithmetic number, because the mean of its divisors is an integer number (3107596496403).

Almost surely, 2^{21122310020212} is an apocalyptic number.

It is an amenable number.

21122310020212 is a deficient number, since it is larger than the sum of its proper divisors (16168847936624).

21122310020212 is a wasteful number, since it uses less digits than its factorization.

21122310020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46730774498 (or 46730774496 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21122310020212 its reverse (21202001322112), we get a palindrome (42324311342324).

The spelling of 21122310020212 in words is "twenty-one trillion, one hundred twenty-two billion, three hundred ten million, twenty thousand, two hundred twelve".