1021020220202 has 4 divisors (see below), whose sum is σ = 1531530330306. Its totient is φ = 510510110100.

The previous prime is 1021020220189. The next prime is 1021020220261. The reversal of 1021020220202 is 2020220201201.

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., 890533829761 + 130486390441 = 943681^2 + 361229^2 .

It is a super-2 number, since 2×1021020220202² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255255055049 + ... + 255255055052.

Almost surely, 2^{1021020220202} is an apocalyptic number.

1021020220202 is a deficient number, since it is larger than the sum of its proper divisors (510510110104).

1021020220202 is an equidigital number, since it uses as much as digits as its factorization.

1021020220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510510110103.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1021020220202 its reverse (2020220201201), we get a palindrome (3041240421403).

The spelling of 1021020220202 in words is "one trillion, twenty-one billion, twenty million, two hundred twenty thousand, two hundred two".