21032123211231 has 16 divisors (see below), whose sum is σ = 30624689547648. Its totient is φ = 12733195368800.

The previous prime is 21032123211227. The next prime is 21032123211233. The reversal of 21032123211231 is 13211232123012.

It is a cyclic number.

It is not a de Polignac number, because 21032123211231 - 2² = 21032123211227 is a prime.

It is a super-2 number, since 2×21032123211231² (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 (21032123211233) 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, 338617761 + ... + 338679866.

It is an arithmetic number, because the mean of its divisors is an integer number (1914043096728).

Almost surely, 2^{21032123211231} is an apocalyptic number.

21032123211231 is a deficient number, since it is larger than the sum of its proper divisors (9592566336417).

21032123211231 is a wasteful number, since it uses less digits than its factorization.

21032123211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677298582.

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

Adding to 21032123211231 its reverse (13211232123012), we get a palindrome (34243355334243).

The spelling of 21032123211231 in words is "twenty-one trillion, thirty-two billion, one hundred twenty-three million, two hundred eleven thousand, two hundred thirty-one".