1001211012122 has 4 divisors (see below), whose sum is σ = 1501816518186. Its totient is φ = 500605506060.

The previous prime is 1001211012091. The next prime is 1001211012149. The reversal of 1001211012122 is 2212101121001.

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., 992615682601 + 8595329521 = 996301^2 + 92711^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1001211012097 and 1001211012106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250302753029 + ... + 250302753032.

Almost surely, 2^{1001211012122} is an apocalyptic number.

1001211012122 is a deficient number, since it is larger than the sum of its proper divisors (500605506064).

1001211012122 is an equidigital number, since it uses as much as digits as its factorization.

1001211012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500605506063.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1001211012122 its reverse (2212101121001), we get a palindrome (3213312133123).

The spelling of 1001211012122 in words is "one trillion, one billion, two hundred eleven million, twelve thousand, one hundred twenty-two".