1000021121212 has 12 divisors (see below), whose sum is σ = 1852980312960. Its totient is φ = 470598174656.

The previous prime is 1000021121147. The next prime is 1000021121221. The reversal of 1000021121212 is 2121211200001.

It is a junction number, because it is equal to n+sod(n) for n = 1000021121192 and 1000021121201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7353096412 + ... + 7353096547.

It is an arithmetic number, because the mean of its divisors is an integer number (154415026080).

Almost surely, 2^{1000021121212} is an apocalyptic number.

It is an amenable number.

1000021121212 is a deficient number, since it is larger than the sum of its proper divisors (852959191748).

1000021121212 is a wasteful number, since it uses less digits than its factorization.

1000021121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14706192980 (or 14706192978 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1000021121212 its reverse (2121211200001), we get a palindrome (3121232321213).

The spelling of 1000021121212 in words is "one trillion, twenty-one million, one hundred twenty-one thousand, two hundred twelve".