1000121020011 has 12 divisors (see below), whose sum is σ = 1469104323960. Its totient is φ = 655446543840.

The previous prime is 1000121019943. The next prime is 1000121020027. The reversal of 1000121020011 is 1100201210001.

It is a happy number.

It is not a de Polignac number, because 1000121020011 - 2¹⁹ = 1000120495723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1000121019975 and 1000121020002.

It is not an unprimeable number, because it can be changed into a prime (1000121020061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 941733010 + ... + 941734071.

It is an arithmetic number, because the mean of its divisors is an integer number (122425360330).

Almost surely, 2^{1000121020011} is an apocalyptic number.

1000121020011 is a deficient number, since it is larger than the sum of its proper divisors (468983303949).

1000121020011 is a wasteful number, since it uses less digits than its factorization.

1000121020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883467146 (or 1883467143 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1000121020011 its reverse (1100201210001), we get a palindrome (2100322230012).

The spelling of 1000121020011 in words is "one trillion, one hundred twenty-one million, twenty thousand, eleven".