1000021110120 has 96 divisors (see below), whose sum is σ = 3269530293120. Its totient is φ = 265075440000.

The previous prime is 1000021110089. The next prime is 1000021110167. The reversal of 1000021110120 is 210111200001.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8256756 + ... + 8376995.

It is an arithmetic number, because the mean of its divisors is an integer number (34057607220).

Almost surely, 2^{1000021110120} is an apocalyptic number.

1000021110120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000021110120 is an abundant number, since it is smaller than the sum of its proper divisors (2269509183000).

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

1000021110120 is a wasteful number, since it uses less digits than its factorization.

1000021110120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16633935 (or 16633928 counting only the distinct ones).

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

Adding to 1000021110120 its reverse (210111200001), we get a palindrome (1210132310121).

The spelling of 1000021110120 in words is "one trillion, twenty-one million, one hundred ten thousand, one hundred twenty".