21032013212 has 24 divisors (see below), whose sum is σ = 43089980640. Its totient is φ = 8793872640.

The previous prime is 21032013203. The next prime is 21032013227. The reversal of 21032013212 is 21231023012.

It is a super-3 number, since 3×21032013212³ (a number of 32 digits) contains 333 as substring.

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, 9159137 + ... + 9161432.

It is an arithmetic number, because the mean of its divisors is an integer number (1795415860).

Almost surely, 2^21032013212 is an apocalyptic number.

It is an amenable number.

21032013212 is an abundant number, since it is smaller than the sum of its proper divisors (22057967428).

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

21032013212 is a wasteful number, since it uses less digits than its factorization.

21032013212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18320621 (or 18320619 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21032013212 its reverse (21231023012), we get a palindrome (42263036224).

The spelling of 21032013212 in words is "twenty-one billion, thirty-two million, thirteen thousand, two hundred twelve".