21101102003031 has 16 divisors (see below), whose sum is σ = 30032702634240. Its totient is φ = 13139307397440.

The previous prime is 21101102003017. The next prime is 21101102003063. The reversal of 21101102003031 is 13030020110112.

It is a happy number.

It is not a de Polignac number, because 21101102003031 - 2¹³ = 21101101994839 is a prime.

It is a super-2 number, since 2×21101102003031² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21101102003031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101102003431) 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, 2607001390 + ... + 2607009483.

It is an arithmetic number, because the mean of its divisors is an integer number (1877043914640).

Almost surely, 2^{21101102003031} is an apocalyptic number.

21101102003031 is a deficient number, since it is larger than the sum of its proper divisors (8931600631209).

21101102003031 is a wasteful number, since it uses less digits than its factorization.

21101102003031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5214010966.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21101102003031 its reverse (13030020110112), we get a palindrome (34131122113143).

The spelling of 21101102003031 in words is "twenty-one trillion, one hundred one billion, one hundred two million, three thousand, thirty-one".