1000021102101 has 48 divisors (see below), whose sum is σ = 1669906263168. Its totient is φ = 564870758400.

The previous prime is 1000021101979. The next prime is 1000021102127. The reversal of 1000021102101 is 1012011200001.

It is a happy number.

It is not a de Polignac number, because 1000021102101 - 2¹⁰ = 1000021101077 is a prime.

It is a super-2 number, since 2×1000021102101² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000021102141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1885281 + ... + 2356761.

It is an arithmetic number, because the mean of its divisors is an integer number (34789713816).

Almost surely, 2^{1000021102101} is an apocalyptic number.

It is an amenable number.

1000021102101 is a deficient number, since it is larger than the sum of its proper divisors (669885161067).

1000021102101 is a wasteful number, since it uses less digits than its factorization.

1000021102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471882 (or 471879 counting only the distinct ones).

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

Adding to 1000021102101 its reverse (1012011200001), we get a palindrome (2012032302102).

The spelling of 1000021102101 in words is "one trillion, twenty-one million, one hundred two thousand, one hundred one".