21011211032 has 32 divisors (see below), whose sum is σ = 45873540000. Its totient is φ = 8834901504.

The previous prime is 21011211029. The next prime is 21011211041. The reversal of 21011211032 is 23011211012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21011210998 and 21011211016.

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, 3536657 + ... + 3542592.

It is an arithmetic number, because the mean of its divisors is an integer number (1433548125).

Almost surely, 2^21011211032 is an apocalyptic number.

It is an amenable number.

21011211032 is an abundant number, since it is smaller than the sum of its proper divisors (24862328968).

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

21011211032 is a wasteful number, since it uses less digits than its factorization.

21011211032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7079315 (or 7079311 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21011211032 its reverse (23011211012), we get a palindrome (44022422044).

The spelling of 21011211032 in words is "twenty-one billion, eleven million, two hundred eleven thousand, thirty-two".