1801000212202 has 4 divisors (see below), whose sum is σ = 2701500318306. Its totient is φ = 900500106100.

The previous prime is 1801000212161. The next prime is 1801000212203. The reversal of 1801000212202 is 2022120001081.

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., 1386767667321 + 414232544881 = 1177611^2 + 643609^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1801000212202.

It is not an unprimeable number, because it can be changed into a prime (1801000212203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450250053049 + ... + 450250053052.

Almost surely, 2^{1801000212202} is an apocalyptic number.

1801000212202 is a deficient number, since it is larger than the sum of its proper divisors (900500106104).

1801000212202 is an equidigital number, since it uses as much as digits as its factorization.

1801000212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900500106103.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1801000212202 its reverse (2022120001081), we get a palindrome (3823120213283).

The spelling of 1801000212202 in words is "one trillion, eight hundred one billion, two hundred twelve thousand, two hundred two".