1000021111012 has 48 divisors (see below), whose sum is σ = 2310209209728. Its totient is φ = 366699870720.

The previous prime is 1000021110953. The next prime is 1000021111013. The reversal of 1000021111012 is 2101111200001.

It is a self number, because there is not a number n which added to its sum of digits gives 1000021111012.

It is not an unprimeable number, because it can be changed into a prime (1000021111013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95489523 + ... + 95499994.

It is an arithmetic number, because the mean of its divisors is an integer number (48129358536).

Almost surely, 2^{1000021111012} is an apocalyptic number.

It is an amenable number.

1000021111012 is an abundant number, since it is smaller than the sum of its proper divisors (1310188098716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000021111012 is a wasteful number, since it uses less digits than its factorization.

1000021111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190989556 (or 190989554 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1000021111012 its reverse (2101111200001), we get a palindrome (3101132311013).

The spelling of 1000021111012 in words is "one trillion, twenty-one million, one hundred eleven thousand, twelve".