1020221020221 has 16 divisors (see below), whose sum is σ = 1512188643840. Its totient is φ = 607575792960.

The previous prime is 1020221020171. The next prime is 1020221020229. The reversal of 1020221020221 is 1220201220201.

It is not a de Polignac number, because 1020221020221 - 2¹⁵ = 1020220987453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020221020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020221020229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421926426 + ... + 421928843.

It is an arithmetic number, because the mean of its divisors is an integer number (94511790240).

Almost surely, 2^{1020221020221} is an apocalyptic number.

It is an amenable number.

1020221020221 is a deficient number, since it is larger than the sum of its proper divisors (491967623619).

1020221020221 is a wasteful number, since it uses less digits than its factorization.

1020221020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843855316.

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

Adding to 1020221020221 its reverse (1220201220201), we get a palindrome (2240422240422).

The spelling of 1020221020221 in words is "one trillion, twenty billion, two hundred twenty-one million, twenty thousand, two hundred twenty-one".