21121310240151 has 8 divisors (see below), whose sum is σ = 30721905803904. Its totient is φ = 12800794084920.

The previous prime is 21121310240137. The next prime is 21121310240153. The reversal of 21121310240151 is 15104201312112.

It is a happy number.

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

It is not a de Polignac number, because 21121310240151 - 2⁹ = 21121310239639 is a prime.

It is a super-2 number, since 2×21121310240151² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121310240153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320019852091 + ... + 320019852156.

It is an arithmetic number, because the mean of its divisors is an integer number (3840238225488).

Almost surely, 2^{21121310240151} is an apocalyptic number.

21121310240151 is a deficient number, since it is larger than the sum of its proper divisors (9600595563753).

21121310240151 is a wasteful number, since it uses less digits than its factorization.

21121310240151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640039704261.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 21121310240151 its reverse (15104201312112), we get a palindrome (36225511552263).

The spelling of 21121310240151 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred ten million, two hundred forty thousand, one hundred fifty-one".