1020210220221 has 4 divisors (see below), whose sum is σ = 1360280293632. Its totient is φ = 680140146812.

The previous prime is 1020210220213. The next prime is 1020210220241. The reversal of 1020210220221 is 1220220120201.

1020210220221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020210220221 - 2³ = 1020210220213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020210220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020210220241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170035036701 + ... + 170035036706.

It is an arithmetic number, because the mean of its divisors is an integer number (340070073408).

Almost surely, 2^{1020210220221} is an apocalyptic number.

It is an amenable number.

1020210220221 is a deficient number, since it is larger than the sum of its proper divisors (340070073411).

1020210220221 is an equidigital number, since it uses as much as digits as its factorization.

1020210220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340070073410.

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

Adding to 1020210220221 its reverse (1220220120201), we get a palindrome (2240430340422).

The spelling of 1020210220221 in words is "one trillion, twenty billion, two hundred ten million, two hundred twenty thousand, two hundred twenty-one".