21122302032012 has 48 divisors (see below), whose sum is σ = 52858193794560. Its totient is φ = 6544347795648.

The previous prime is 21122302032011. The next prime is 21122302032019. The reversal of 21122302032012 is 21023020322112.

It is a self number, because there is not a number n which added to its sum of digits gives 21122302032012.

It is not an unprimeable number, because it can be changed into a prime (21122302032011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 873965988 + ... + 873990155.

It is an arithmetic number, because the mean of its divisors is an integer number (1101212370720).

Almost surely, 2^{21122302032012} is an apocalyptic number.

It is an amenable number.

21122302032012 is an abundant number, since it is smaller than the sum of its proper divisors (31735891762548).

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

21122302032012 is a wasteful number, since it uses less digits than its factorization.

21122302032012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747956222 (or 1747956220 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21122302032012 its reverse (21023020322112), we get a palindrome (42145322354124).

The spelling of 21122302032012 in words is "twenty-one trillion, one hundred twenty-two billion, three hundred two million, thirty-two thousand, twelve".