1021212021202 has 4 divisors (see below), whose sum is σ = 1531818031806. Its totient is φ = 510606010600.

The previous prime is 1021212021191. The next prime is 1021212021229. The reversal of 1021212021202 is 2021202121201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 875701052521 + 145510968681 = 935789^2 + 381459^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255303005299 + ... + 255303005302.

Almost surely, 2^{1021212021202} is an apocalyptic number.

1021212021202 is a deficient number, since it is larger than the sum of its proper divisors (510606010604).

1021212021202 is an equidigital number, since it uses as much as digits as its factorization.

1021212021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510606010603.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1021212021202 its reverse (2021202121201), we get a palindrome (3042414142403).

Subtracting 1021212021202 from its reverse (2021202121201), we obtain a palindrome (999990099999).

It can be divided in two parts, 10 and 21212021202, that added together give a palindrome (21212021212).

The spelling of 1021212021202 in words is "one trillion, twenty-one billion, two hundred twelve million, twenty-one thousand, two hundred two".