1220020201021 has 16 divisors (see below), whose sum is σ = 1228675392000. Its totient is φ = 1211393145600.

The previous prime is 1220020200983. The next prime is 1220020201069. The reversal of 1220020201021 is 1201020200221.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220020201021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220020200992 and 1220020201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220020201121) 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 15 ways as a sum of consecutive naturals, for example, 242113020 + ... + 242118058.

It is an arithmetic number, because the mean of its divisors is an integer number (76792212000).

Almost surely, 2^{1220020201021} is an apocalyptic number.

It is an amenable number.

1220020201021 is a deficient number, since it is larger than the sum of its proper divisors (8655190979).

1220020201021 is a wasteful number, since it uses less digits than its factorization.

1220020201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7500.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1220020201021 its reverse (1201020200221), we get a palindrome (2421040401242).

The spelling of 1220020201021 in words is "one trillion, two hundred twenty billion, twenty million, two hundred one thousand, twenty-one".