21000153131331 has 32 divisors (see below), whose sum is σ = 31565507846400. Its totient is φ = 12308297232000.

The previous prime is 21000153131131. The next prime is 21000153131351. The reversal of 21000153131331 is 13313135100012.

It is a happy number.

It is not a de Polignac number, because 21000153131331 - 2¹⁵ = 21000153098563 is a prime.

It is a super-2 number, since 2×21000153131331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21000153131351) 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 31 ways as a sum of consecutive naturals, for example, 73120356 + ... + 73406993.

It is an arithmetic number, because the mean of its divisors is an integer number (986422120200).

Almost surely, 2^{21000153131331} is an apocalyptic number.

21000153131331 is a deficient number, since it is larger than the sum of its proper divisors (10565354715069).

21000153131331 is a wasteful number, since it uses less digits than its factorization.

21000153131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146527507.

The product of its (nonzero) digits is 810, while the sum is 24.

Adding to 21000153131331 its reverse (13313135100012), we get a palindrome (34313288231343).

The spelling of 21000153131331 in words is "twenty-one trillion, one hundred fifty-three million, one hundred thirty-one thousand, three hundred thirty-one".