1000121211011 has 4 divisors (see below), whose sum is σ = 1077053611872. Its totient is φ = 923188810152.

The previous prime is 1000121210981. The next prime is 1000121211049. The reversal of 1000121211011 is 1101121210001.

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-1000121211011 is a prime.

It is a super-3 number, since 3×1000121211011³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000121210983 and 1000121211001.

It is not an unprimeable number, because it can be changed into a prime (1000121214011) 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, 38466200411 + ... + 38466200436.

It is an arithmetic number, because the mean of its divisors is an integer number (269263402968).

Almost surely, 2^{1000121211011} is an apocalyptic number.

1000121211011 is a deficient number, since it is larger than the sum of its proper divisors (76932400861).

1000121211011 is an equidigital number, since it uses as much as digits as its factorization.

1000121211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76932400860.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1000121211011 its reverse (1101121210001), we get a palindrome (2101242421012).

The spelling of 1000121211011 in words is "one trillion, one hundred twenty-one million, two hundred eleven thousand, eleven".