2001011111122 has 4 divisors (see below), whose sum is σ = 3001516666686. Its totient is φ = 1000505555560.

The previous prime is 2001011111107. The next prime is 2001011111129. The reversal of 2001011111122 is 2211111101002.

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., 1823442421801 + 177568689321 = 1350349^2 + 421389^2 .

It is not an unprimeable number, because it can be changed into a prime (2001011111129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500252777779 + ... + 500252777782.

Almost surely, 2^{2001011111122} is an apocalyptic number.

2001011111122 is a deficient number, since it is larger than the sum of its proper divisors (1000505555564).

2001011111122 is a wasteful number, since it uses less digits than its factorization.

2001011111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000505555563.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2001011111122 its reverse (2211111101002), we get a palindrome (4212122212124).

The spelling of 2001011111122 in words is "two trillion, one billion, eleven million, one hundred eleven thousand, one hundred twenty-two".