21220200023202 has 24 divisors (see below), whose sum is σ = 47219724377436. Its totient is φ = 6882227034336.

The previous prime is 21220200023201. The next prime is 21220200023203. The reversal of 21220200023202 is 20232000202212.

21220200023202 is a `hidden beast` number, since 21 + 220 + 200 + 0 + 23 + 202 = 666.

It is an interprime number because it is at equal distance from previous prime (21220200023201) and next prime (21220200023203).

It can be written as a sum of positive squares in 2 ways, for example, as 20874198431241 + 346001591961 = 4568829^2 + 588219^2 .

It is a super-2 number, since 2×21220200023202² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21220200023201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15931080433 + ... + 15931081764.

Almost surely, 2^{21220200023202} is an apocalyptic number.

21220200023202 is an abundant number, since it is smaller than the sum of its proper divisors (25999524354234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21220200023202 is a wasteful number, since it uses less digits than its factorization.

21220200023202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31862162242 (or 31862162239 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21220200023202 its reverse (20232000202212), we get a palindrome (41452200225414).

The spelling of 21220200023202 in words is "twenty-one trillion, two hundred twenty billion, two hundred million, twenty-three thousand, two hundred two".