21220100000144 has 10 divisors (see below), whose sum is σ = 41113943750310. Its totient is φ = 10610050000064.

The previous prime is 21220100000137. The next prime is 21220100000173. The reversal of 21220100000144 is 44100000102212.

It can be written as a sum of positive squares in only one way, i.e., 13964511295744 + 7255588704400 = 3736912^2 + 2693620^2 .

It is a super-2 number, since 2×21220100000144² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663128124989 + ... + 663128125020.

It is an arithmetic number, because the mean of its divisors is an integer number (4111394375031).

Almost surely, 2^{21220100000144} is an apocalyptic number.

It is an amenable number.

21220100000144 is a deficient number, since it is larger than the sum of its proper divisors (19893843750166).

21220100000144 is a wasteful number, since it uses less digits than its factorization.

21220100000144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326256250017 (or 1326256250011 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21220100000144 its reverse (44100000102212), we get a palindrome (65320100102356).

The spelling of 21220100000144 in words is "twenty-one trillion, two hundred twenty billion, one hundred million, one hundred forty-four", and thus it is an aban number.