21434222155502 has 16 divisors (see below), whose sum is σ = 34628381317152. Its totient is φ = 9891612602400.

The previous prime is 21434222155459. The next prime is 21434222155517. The reversal of 21434222155502 is 20555122243412.

It is a super-2 number, since 2×21434222155502² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45817613 + ... + 46283064.

It is an arithmetic number, because the mean of its divisors is an integer number (2164273832322).

Almost surely, 2^{21434222155502} is an apocalyptic number.

21434222155502 is a deficient number, since it is larger than the sum of its proper divisors (13194159161650).

21434222155502 is a wasteful number, since it uses less digits than its factorization.

21434222155502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92109643.

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 21434222155502 its reverse (20555122243412), we get a palindrome (41989344398914).

It can be divided in two parts, 2143422 and 2155502, that added together give a palindrome (4298924).

The spelling of 21434222155502 in words is "twenty-one trillion, four hundred thirty-four billion, two hundred twenty-two million, one hundred fifty-five thousand, five hundred two".