21011002001012 has 24 divisors (see below), whose sum is σ = 37051152008640. Its totient is φ = 10424963839680.

The previous prime is 21011002000979. The next prime is 21011002001023. The reversal of 21011002001012 is 21010020011012.

It is a super-3 number, since 3×21011002001012³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21011002000984 and 21011002001002.

It is a congruent number.

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, 15693689 + ... + 16979807.

It is an arithmetic number, because the mean of its divisors is an integer number (1543798000360).

Almost surely, 2^{21011002001012} is an apocalyptic number.

It is an amenable number.

21011002001012 is a deficient number, since it is larger than the sum of its proper divisors (16040150007628).

21011002001012 is a wasteful number, since it uses less digits than its factorization.

21011002001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317431 (or 1317429 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21011002001012 its reverse (21010020011012), we get a palindrome (42021022012024).

The spelling of 21011002001012 in words is "twenty-one trillion, eleven billion, two million, one thousand, twelve".