21001211032 has 8 divisors (see below), whose sum is σ = 39377270700. Its totient is φ = 10500605512.

The previous prime is 21001211029. The next prime is 21001211041. The reversal of 21001211032 is 23011210012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1312575682 + ... + 1312575697.

Almost surely, 2^21001211032 is an apocalyptic number.

It is an amenable number.

21001211032 is a deficient number, since it is larger than the sum of its proper divisors (18376059668).

21001211032 is a wasteful number, since it uses less digits than its factorization.

21001211032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625151385 (or 2625151381 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21001211032 its reverse (23011210012), we get a palindrome (44012421044).

The spelling of 21001211032 in words is "twenty-one billion, one million, two hundred eleven thousand, thirty-two".