21001010012 has 24 divisors (see below), whose sum is σ = 36995572992. Its totient is φ = 10431000000.

The previous prime is 21001009999. The next prime is 21001010029.

21001010012 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541262 + ... + 578762.

It is an arithmetic number, because the mean of its divisors is an integer number (1541482208).

Almost surely, 2^21001010012 is an apocalyptic number.

It is an amenable number.

21001010012 is a deficient number, since it is larger than the sum of its proper divisors (15994562980).

21001010012 is a wasteful number, since it uses less digits than its factorization.

21001010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38429 (or 38427 counting only the distinct ones).

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

It can be divided in two parts, 210010 and 10012, that added together give a palindrome (220022).

The spelling of 21001010012 in words is "twenty-one billion, one million, ten thousand, twelve".