220121021001012 has 12 divisors (see below), whose sum is σ = 513615715669056. Its totient is φ = 73373673667000.

The previous prime is 220121021000989. The next prime is 220121021001019. The reversal of 220121021001012 is 210100120121022.

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 = 220121021000982 and 220121021001000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121021001019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9171709208364 + ... + 9171709208387.

It is an arithmetic number, because the mean of its divisors is an integer number (42801309639088).

Almost surely, 2^{220121021001012} is an apocalyptic number.

It is an amenable number.

220121021001012 is an abundant number, since it is smaller than the sum of its proper divisors (293494694668044).

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

220121021001012 is a wasteful number, since it uses less digits than its factorization.

220121021001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18343418416758 (or 18343418416756 counting only the distinct ones).

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

Adding to 220121021001012 its reverse (210100120121022), we get a palindrome (430221141122034).

The spelling of 220121021001012 in words is "two hundred twenty trillion, one hundred twenty-one billion, twenty-one million, one thousand, twelve".