21220121002014 has 80 divisors (see below), whose sum is σ = 52496363969280. Its totient is φ = 6352865681040.

The previous prime is 21220121002009. The next prime is 21220121002019. The reversal of 21220121002014 is 41020012102212.

It is an interprime number because it is at equal distance from previous prime (21220121002009) and next prime (21220121002019).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220121002019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 71587254 + ... + 71883065.

It is an arithmetic number, because the mean of its divisors is an integer number (656204549616).

Almost surely, 2^{21220121002014} is an apocalyptic number.

21220121002014 is an abundant number, since it is smaller than the sum of its proper divisors (31276242967266).

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

21220121002014 is a wasteful number, since it uses less digits than its factorization.

21220121002014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143470427 (or 143470418 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21220121002014 its reverse (41020012102212), we get a palindrome (62240133104226).

The spelling of 21220121002014 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-one million, two thousand, fourteen".