1021212220202 has 8 divisors (see below), whose sum is σ = 1533666123300. Its totient is φ = 509990179104.

The previous prime is 1021212220183. The next prime is 1021212220271. The reversal of 1021212220202 is 2020222121201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 916961371561 + 104250848641 = 957581^2 + 322879^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307963427 + ... + 307966742.

Almost surely, 2^{1021212220202} is an apocalyptic number.

1021212220202 is a deficient number, since it is larger than the sum of its proper divisors (512453903098).

1021212220202 is an equidigital number, since it uses as much as digits as its factorization.

1021212220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615931000.

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

Adding to 1021212220202 its reverse (2020222121201), we get a palindrome (3041434341403).

Subtracting 1021212220202 from its reverse (2020222121201), we obtain a palindrome (999009900999).

The spelling of 1021212220202 in words is "one trillion, twenty-one billion, two hundred twelve million, two hundred twenty thousand, two hundred two".