1012211322011 has 4 divisors (see below), whose sum is σ = 1013775791472. Its totient is φ = 1010646852552.

The previous prime is 1012211321987. The next prime is 1012211322049. The reversal of 1012211322011 is 1102231122101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012211322011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012211342011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782233760 + ... + 782235053.

It is an arithmetic number, because the mean of its divisors is an integer number (253443947868).

Almost surely, 2^{1012211322011} is an apocalyptic number.

1012211322011 is a deficient number, since it is larger than the sum of its proper divisors (1564469461).

1012211322011 is an equidigital number, since it uses as much as digits as its factorization.

1012211322011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564469460.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1012211322011 its reverse (1102231122101), we get a palindrome (2114442444112).

The spelling of 1012211322011 in words is "one trillion, twelve billion, two hundred eleven million, three hundred twenty-two thousand, eleven".