1220010100221 has 24 divisors (see below), whose sum is σ = 1893180485952. Its totient is φ = 695905936000.

The previous prime is 1220010100219. The next prime is 1220010100241.

1220010100221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1220010100221 - 2¹ = 1220010100219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220010100197 and 1220010100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220010100241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98844105 + ... + 98856446.

It is an arithmetic number, because the mean of its divisors is an integer number (78882520248).

Almost surely, 2^{1220010100221} is an apocalyptic number.

1220010100221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220010100221 is a deficient number, since it is larger than the sum of its proper divisors (673170385731).

1220010100221 is a wasteful number, since it uses less digits than its factorization.

1220010100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197700593 (or 197700582 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

It can be divided in two parts, 1220010 and 100221, that added together give a palindrome (1320231).

The spelling of 1220010100221 in words is "one trillion, two hundred twenty billion, ten million, one hundred thousand, two hundred twenty-one".