1011221220202 has 4 divisors (see below), whose sum is σ = 1516831830306. Its totient is φ = 505610610100.

The previous prime is 1011221220169. The next prime is 1011221220227. The reversal of 1011221220202 is 2020221221101.

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., 895708923561 + 115512296641 = 946419^2 + 339871^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252805305049 + ... + 252805305052.

Almost surely, 2^{1011221220202} is an apocalyptic number.

1011221220202 is a deficient number, since it is larger than the sum of its proper divisors (505610610104).

1011221220202 is an equidigital number, since it uses as much as digits as its factorization.

1011221220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505610610103.

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

Adding to 1011221220202 its reverse (2020221221101), we get a palindrome (3031442441303).

The spelling of 1011221220202 in words is "one trillion, eleven billion, two hundred twenty-one million, two hundred twenty thousand, two hundred two".