21212320221014 has 32 divisors (see below), whose sum is σ = 36988845808320. Its totient is φ = 9041717849472.

The previous prime is 21212320221013. The next prime is 21212320221017. The reversal of 21212320221014 is 41012202321212.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212320221013) 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, 611570717 + ... + 611605400.

It is an arithmetic number, because the mean of its divisors is an integer number (1155901431510).

Almost surely, 2^{21212320221014} is an apocalyptic number.

21212320221014 is a deficient number, since it is larger than the sum of its proper divisors (15776525587306).

21212320221014 is a wasteful number, since it uses less digits than its factorization.

21212320221014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223176184.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21212320221014 its reverse (41012202321212), we get a palindrome (62224522542226).

The spelling of 21212320221014 in words is "twenty-one trillion, two hundred twelve billion, three hundred twenty million, two hundred twenty-one thousand, fourteen".