21101112301031 has 12 divisors (see below), whose sum is σ = 25838096696280. Its totient is φ = 17134737807600.

The previous prime is 21101112300973. The next prime is 21101112301079. The reversal of 21101112301031 is 13010321110112.

It is not a de Polignac number, because 21101112301031 - 2⁶ = 21101112300967 is a prime.

It is a super-2 number, since 2×21101112301031² (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 (21101112301531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11332497620 + ... + 11332499481.

It is an arithmetic number, because the mean of its divisors is an integer number (2153174724690).

Almost surely, 2^{21101112301031} is an apocalyptic number.

21101112301031 is a deficient number, since it is larger than the sum of its proper divisors (4736984395249).

21101112301031 is a wasteful number, since it uses less digits than its factorization.

21101112301031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22664997134 (or 22664997127 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 21101112301031 its reverse (13010321110112), we get a palindrome (34111433411143).

The spelling of 21101112301031 in words is "twenty-one trillion, one hundred one billion, one hundred twelve million, three hundred one thousand, thirty-one".