21020032332201 has 16 divisors (see below), whose sum is σ = 32087418061824. Its totient is φ = 11990112320784.

The previous prime is 21020032332191. The next prime is 21020032332253. The reversal of 21020032332201 is 10223323002012.

It is a happy number.

It is not a de Polignac number, because 21020032332201 - 2⁹ = 21020032331689 is a prime.

It is a super-2 number, since 2×21020032332201² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21020032332281) 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, 888934821 + ... + 888958466.

It is an arithmetic number, because the mean of its divisors is an integer number (2005463628864).

Almost surely, 2^{21020032332201} is an apocalyptic number.

21020032332201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21020032332201 is a deficient number, since it is larger than the sum of its proper divisors (11067385729623).

21020032332201 is a wasteful number, since it uses less digits than its factorization.

21020032332201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777893860.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21020032332201 its reverse (10223323002012), we get a palindrome (31243355334213).

The spelling of 21020032332201 in words is "twenty-one trillion, twenty billion, thirty-two million, three hundred thirty-two thousand, two hundred one".