1020021111202 has 4 divisors (see below), whose sum is σ = 1530031666806. Its totient is φ = 510010555600.

The previous prime is 1020021111199. The next prime is 1020021111269. The reversal of 1020021111202 is 2021111200201.

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., 810019800121 + 210001311081 = 900011^2 + 458259^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255005277799 + ... + 255005277802.

Almost surely, 2^{1020021111202} is an apocalyptic number.

1020021111202 is a deficient number, since it is larger than the sum of its proper divisors (510010555604).

1020021111202 is an equidigital number, since it uses as much as digits as its factorization.

1020021111202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510010555603.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1020021111202 its reverse (2021111200201), we get a palindrome (3041132311403).

The spelling of 1020021111202 in words is "one trillion, twenty billion, twenty-one million, one hundred eleven thousand, two hundred two".