21323312220001 has 16 divisors (see below), whose sum is σ = 23309713183680. Its totient is φ = 19344904850880.

The previous prime is 21323312219939. The next prime is 21323312220019. The reversal of 21323312220001 is 10002221332312.

It is a cyclic number.

It is not a de Polignac number, because 21323312220001 - 2²⁵ = 21323278665569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21323312220101) 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, 60500650 + ... + 60852076.

It is an arithmetic number, because the mean of its divisors is an integer number (1456857073980).

Almost surely, 2^{21323312220001} is an apocalyptic number.

It is an amenable number.

21323312220001 is a deficient number, since it is larger than the sum of its proper divisors (1986400963679).

21323312220001 is a wasteful number, since it uses less digits than its factorization.

21323312220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362784.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21323312220001 its reverse (10002221332312), we get a palindrome (31325533552313).

It can be divided in two parts, 2132 and 3312220001, that added together give a palindrome (3312222133).

The spelling of 21323312220001 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred twelve million, two hundred twenty thousand, one".