21220110120012 has 12 divisors (see below), whose sum is σ = 49513590280056. Its totient is φ = 7073370040000.

The previous prime is 21220110119987. The next prime is 21220110120037. The reversal of 21220110120012 is 21002101102212.

It is an interprime number because it is at equal distance from previous prime (21220110119987) and next prime (21220110120037).

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21220110119973 and 21220110120000.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 884171254989 + ... + 884171255012.

It is an arithmetic number, because the mean of its divisors is an integer number (4126132523338).

Almost surely, 2^{21220110120012} is an apocalyptic number.

It is an amenable number.

21220110120012 is an abundant number, since it is smaller than the sum of its proper divisors (28293480160044).

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

21220110120012 is a wasteful number, since it uses less digits than its factorization.

21220110120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768342510008 (or 1768342510006 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21220110120012 its reverse (21002101102212), we get a palindrome (42222211222224).

The spelling of 21220110120012 in words is "twenty-one trillion, two hundred twenty billion, one hundred ten million, one hundred twenty thousand, twelve".