1000021021100 has 36 divisors (see below), whose sum is σ = 2170231971264. Its totient is φ = 399974057280.

The previous prime is 1000021021093. The next prime is 1000021021117. The reversal of 1000021021100 is 11201200001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 757214 + ... + 1604186.

It is an arithmetic number, because the mean of its divisors is an integer number (60284221424).

Almost surely, 2^{1000021021100} is an apocalyptic number.

1000021021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000021021100 is an abundant number, since it is smaller than the sum of its proper divisors (1170210950164).

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

1000021021100 is a wasteful number, since it uses less digits than its factorization.

1000021021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858794 (or 858787 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1000021021100 its reverse (11201200001), we get a palindrome (1011222221101).

The spelling of 1000021021100 in words is "one trillion, twenty-one million, twenty-one thousand, one hundred".