21000100203012 has 24 divisors (see below), whose sum is σ = 56000267208256. Its totient is φ = 6000028629408.

The previous prime is 21000100202969. The next prime is 21000100203029. The reversal of 21000100203012 is 21030200100012.

It is a super-2 number, since 2×21000100203012² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125000596363 + ... + 125000596530.

Almost surely, 2^{21000100203012} is an apocalyptic number.

It is an amenable number.

21000100203012 is an abundant number, since it is smaller than the sum of its proper divisors (35000167005244).

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

21000100203012 is a wasteful number, since it uses less digits than its factorization.

21000100203012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250001192907 (or 250001192905 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21000100203012 its reverse (21030200100012), we get a palindrome (42030300303024).

The spelling of 21000100203012 in words is "twenty-one trillion, one hundred million, two hundred three thousand, twelve".