21020030232133 has 16 divisors (see below), whose sum is σ = 21078874754496. Its totient is φ = 20961293633280.

The previous prime is 21020030232121. The next prime is 21020030232151. The reversal of 21020030232133 is 33123203002012.

It is a cyclic number.

It is not a de Polignac number, because 21020030232133 - 2⁹ = 21020030231621 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 (21020030232533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1566197763 + ... + 1566211183.

It is an arithmetic number, because the mean of its divisors is an integer number (1317429672156).

Almost surely, 2^{21020030232133} is an apocalyptic number.

It is an amenable number.

21020030232133 is a deficient number, since it is larger than the sum of its proper divisors (58844522363).

21020030232133 is a wasteful number, since it uses less digits than its factorization.

21020030232133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17124.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21020030232133 its reverse (33123203002012), we get a palindrome (54143233234145).

The spelling of 21020030232133 in words is "twenty-one trillion, twenty billion, thirty million, two hundred thirty-two thousand, one hundred thirty-three".