21102132321231 has 16 divisors (see below), whose sum is σ = 30457495100256. Its totient is φ = 12918642978816.

The previous prime is 21102132321197. The next prime is 21102132321269. The reversal of 21102132321231 is 13212323120112.

It is not a de Polignac number, because 21102132321231 - 2¹⁷ = 21102132190159 is a prime.

It is a super-2 number, since 2×21102132321231² (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 (21102132320231) 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, 1401754950 + ... + 1401770003.

It is an arithmetic number, because the mean of its divisors is an integer number (1903593443766).

Almost surely, 2^{21102132321231} is an apocalyptic number.

21102132321231 is a deficient number, since it is larger than the sum of its proper divisors (9355362779025).

21102132321231 is a wasteful number, since it uses less digits than its factorization.

21102132321231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803525162.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21102132321231 its reverse (13212323120112), we get a palindrome (34314455441343).

The spelling of 21102132321231 in words is "twenty-one trillion, one hundred two billion, one hundred thirty-two million, three hundred twenty-one thousand, two hundred thirty-one".