1020212220221 has 16 divisors (see below), whose sum is σ = 1037923544448. Its totient is φ = 1002576960000.

The previous prime is 1020212220217. The next prime is 1020212220227. The reversal of 1020212220221 is 1220222120201.

It is a happy number.

1020212220221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1020212220221 - 2² = 1020212220217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020212220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020212220227) 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, 48568721 + ... + 48589721.

It is an arithmetic number, because the mean of its divisors is an integer number (64870221528).

Almost surely, 2^{1020212220221} is an apocalyptic number.

It is an amenable number.

1020212220221 is a deficient number, since it is larger than the sum of its proper divisors (17711324227).

1020212220221 is an equidigital number, since it uses as much as digits as its factorization.

1020212220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22772.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1020212220221 its reverse (1220222120201), we get a palindrome (2240434340422).

The spelling of 1020212220221 in words is "one trillion, twenty billion, two hundred twelve million, two hundred twenty thousand, two hundred twenty-one".