21030122311 has 4 divisors (see below), whose sum is σ = 22941951624. Its totient is φ = 19118293000.

The previous prime is 21030122287. The next prime is 21030122327. The reversal of 21030122311 is 11322103012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21030122311 - 2⁹ = 21030121799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030122371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 955914640 + ... + 955914661.

It is an arithmetic number, because the mean of its divisors is an integer number (5735487906).

Almost surely, 2^21030122311 is an apocalyptic number.

21030122311 is a deficient number, since it is larger than the sum of its proper divisors (1911829313).

21030122311 is a wasteful number, since it uses less digits than its factorization.

21030122311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911829312.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21030122311 its reverse (11322103012), we get a palindrome (32352225323).

It can be divided in two parts, 21030 and 122311, that added together give a palindrome (143341).

The spelling of 21030122311 in words is "twenty-one billion, thirty million, one hundred twenty-two thousand, three hundred eleven".