21221032103120 has 80 divisors (see below), whose sum is σ = 51936598880640. Its totient is φ = 8041512586752.

The previous prime is 21221032103083. The next prime is 21221032103153. The reversal of 21221032103120 is 2130123012212.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21221032103092 and 21221032103101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134977997 + ... + 135135123.

It is an arithmetic number, because the mean of its divisors is an integer number (649207486008).

Almost surely, 2^{21221032103120} is an apocalyptic number.

21221032103120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21221032103120 is an abundant number, since it is smaller than the sum of its proper divisors (30715566777520).

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

21221032103120 is a wasteful number, since it uses less digits than its factorization.

21221032103120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246012 (or 246006 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21221032103120 its reverse (2130123012212), we get a palindrome (23351155115332).

The spelling of 21221032103120 in words is "twenty-one trillion, two hundred twenty-one billion, thirty-two million, one hundred three thousand, one hundred twenty".