21220001033 has 16 divisors (see below), whose sum is σ = 26473399296. Its totient is φ = 16524257040.

The previous prime is 21220001027. The next prime is 21220001039. The reversal of 21220001033 is 33010002212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21220001027) and next prime (21220001039).

It is a cyclic number.

It is not a de Polignac number, because 21220001033 - 2¹⁶ = 21219935497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21220000999 and 21220001017.

It is not an unprimeable number, because it can be changed into a prime (21220001039) 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, 29510 + ... + 208112.

It is an arithmetic number, because the mean of its divisors is an integer number (1654587456).

Almost surely, 2^21220001033 is an apocalyptic number.

It is an amenable number.

21220001033 is a deficient number, since it is larger than the sum of its proper divisors (5253398263).

21220001033 is a wasteful number, since it uses less digits than its factorization.

21220001033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180164.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21220001033 its reverse (33010002212), we get a palindrome (54230003245).

The spelling of 21220001033 in words is "twenty-one billion, two hundred twenty million, one thousand, thirty-three".