21100220103131 has 16 divisors (see below), whose sum is σ = 22751705088000. Its totient is φ = 19452793682208.

The previous prime is 21100220103119. The next prime is 21100220103143. The reversal of 21100220103131 is 13130102200112.

It is an interprime number because it is at equal distance from previous prime (21100220103119) and next prime (21100220103143).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21100220103131 is a prime.

It is a super-2 number, since 2×21100220103131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100220103731) 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, 235535510 + ... + 235625076.

It is an arithmetic number, because the mean of its divisors is an integer number (1421981568000).

Almost surely, 2^{21100220103131} is an apocalyptic number.

21100220103131 is a deficient number, since it is larger than the sum of its proper divisors (1651484984869).

21100220103131 is a wasteful number, since it uses less digits than its factorization.

21100220103131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112018.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21100220103131 its reverse (13130102200112), we get a palindrome (34230322303243).

The spelling of 21100220103131 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, one hundred three thousand, one hundred thirty-one".