21151224355029 has 16 divisors (see below), whose sum is σ = 28858252112640. Its totient is φ = 13773685269440.

The previous prime is 21151224355007. The next prime is 21151224355081. The reversal of 21151224355029 is 92055342215112.

It is a cyclic number.

It is not a de Polignac number, because 21151224355029 - 2¹¹ = 21151224352981 is a prime.

It is a super-3 number, since 3×21151224355029³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21151224353029) 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, 147284502 + ... + 147428039.

It is an arithmetic number, because the mean of its divisors is an integer number (1803640757040).

Almost surely, 2^{21151224355029} is an apocalyptic number.

It is an amenable number.

21151224355029 is a deficient number, since it is larger than the sum of its proper divisors (7707027757611).

21151224355029 is a wasteful number, since it uses less digits than its factorization.

21151224355029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294713100.

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 21151224355029 in words is "twenty-one trillion, one hundred fifty-one billion, two hundred twenty-four million, three hundred fifty-five thousand, twenty-nine".