1211311302202 has 4 divisors (see below), whose sum is σ = 1816966953306. Its totient is φ = 605655651100.

The previous prime is 1211311302199. The next prime is 1211311302251. The reversal of 1211311302202 is 2022031131121.

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., 800275165561 + 411036136641 = 894581^2 + 641121^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1211311302202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302827825549 + ... + 302827825552.

Almost surely, 2^{1211311302202} is an apocalyptic number.

1211311302202 is a deficient number, since it is larger than the sum of its proper divisors (605655651104).

1211311302202 is an equidigital number, since it uses as much as digits as its factorization.

1211311302202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605655651103.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1211311302202 its reverse (2022031131121), we get a palindrome (3233342433323).

The spelling of 1211311302202 in words is "one trillion, two hundred eleven billion, three hundred eleven million, three hundred two thousand, two hundred two".