1020120220221 has 8 divisors (see below), whose sum is σ = 1393334935104. Its totient is φ = 663492826080.

The previous prime is 1020120220199. The next prime is 1020120220247. The reversal of 1020120220221 is 1220220210201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1020120220221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020120220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020120228221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4146830041 + ... + 4146830286.

It is an arithmetic number, because the mean of its divisors is an integer number (174166866888).

Almost surely, 2^{1020120220221} is an apocalyptic number.

It is an amenable number.

1020120220221 is a deficient number, since it is larger than the sum of its proper divisors (373214714883).

1020120220221 is an equidigital number, since it uses as much as digits as its factorization.

1020120220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8293660371.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1020120220221 its reverse (1220220210201), we get a palindrome (2240340430422).

The spelling of 1020120220221 in words is "one trillion, twenty billion, one hundred twenty million, two hundred twenty thousand, two hundred twenty-one".