21512532134211 has 32 divisors (see below), whose sum is σ = 29229047032320. Its totient is φ = 14070882470400.

The previous prime is 21512532134179. The next prime is 21512532134251. The reversal of 21512532134211 is 11243123521512.

It is not a de Polignac number, because 21512532134211 - 2⁵ = 21512532134179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21512532134251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97980891 + ... + 98200203.

It is an arithmetic number, because the mean of its divisors is an integer number (913407719760).

Almost surely, 2^{21512532134211} is an apocalyptic number.

21512532134211 is a deficient number, since it is larger than the sum of its proper divisors (7716514898109).

21512532134211 is a wasteful number, since it uses less digits than its factorization.

21512532134211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221627.

The product of its digits is 14400, while the sum is 33.

Adding to 21512532134211 its reverse (11243123521512), we get a palindrome (32755655655723).

The spelling of 21512532134211 in words is "twenty-one trillion, five hundred twelve billion, five hundred thirty-two million, one hundred thirty-four thousand, two hundred eleven".