1000002121011 has 32 divisors (see below), whose sum is σ = 1534046592000. Its totient is φ = 643059484704.

The previous prime is 1000002121007. The next prime is 1000002121073. The reversal of 1000002121011 is 1101212000001.

It is a happy number.

It is not a de Polignac number, because 1000002121011 - 2² = 1000002121007 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 = 1000002120984 and 1000002121002.

It is not an unprimeable number, because it can be changed into a prime (1000002121091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198936 + ... + 1428138.

It is an arithmetic number, because the mean of its divisors is an integer number (47938956000).

Almost surely, 2^{1000002121011} is an apocalyptic number.

1000002121011 is a deficient number, since it is larger than the sum of its proper divisors (534044470989).

1000002121011 is a wasteful number, since it uses less digits than its factorization.

1000002121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230280 (or 1230274 counting only the distinct ones).

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

Adding to 1000002121011 its reverse (1101212000001), we get a palindrome (2101214121012).

The spelling of 1000002121011 in words is "one trillion, two million, one hundred twenty-one thousand, eleven".