2001223212202 has 4 divisors (see below), whose sum is σ = 3001834818306. Its totient is φ = 1000611606100.

The previous prime is 2001223212199. The next prime is 2001223212227. The reversal of 2001223212202 is 2022123221002.

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., 1936853940681 + 64369271521 = 1391709^2 + 253711^2 .

It is a super-2 number, since 2×2001223212202² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2001223212202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500305803049 + ... + 500305803052.

Almost surely, 2^{2001223212202} is an apocalyptic number.

2001223212202 is a deficient number, since it is larger than the sum of its proper divisors (1000611606104).

2001223212202 is a wasteful number, since it uses less digits than its factorization.

2001223212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000611606103.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 2001223212202 its reverse (2022123221002), we get a palindrome (4023346433204).

The spelling of 2001223212202 in words is "two trillion, one billion, two hundred twenty-three million, two hundred twelve thousand, two hundred two".