21251154503122 has 8 divisors (see below), whose sum is σ = 31876751880576. Its totient is φ = 10625570542932.

The previous prime is 21251154503101. The next prime is 21251154503149. The reversal of 21251154503122 is 22130545115212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21251154503122² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3053703 + ... + 7199125.

It is an arithmetic number, because the mean of its divisors is an integer number (3984593985072).

Almost surely, 2^{21251154503122} is an apocalyptic number.

21251154503122 is a deficient number, since it is larger than the sum of its proper divisors (10625597377454).

21251154503122 is a wasteful number, since it uses less digits than its factorization.

21251154503122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6708632.

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 21251154503122 its reverse (22130545115212), we get a palindrome (43381699618334).

The spelling of 21251154503122 in words is "twenty-one trillion, two hundred fifty-one billion, one hundred fifty-four million, five hundred three thousand, one hundred twenty-two".