21100020103011 has 16 divisors (see below), whose sum is σ = 28165768596000. Its totient is φ = 14050480324608.

The previous prime is 21100020102943. The next prime is 21100020103031. The reversal of 21100020103011 is 11030102000112.

It is not a de Polignac number, because 21100020103011 - 2¹⁰ = 21100020101987 is a prime.

It is a super-2 number, since 2×21100020103011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21100020103031) 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, 18382915 + ... + 19496963.

It is an arithmetic number, because the mean of its divisors is an integer number (1760360537250).

Almost surely, 2^{21100020103011} is an apocalyptic number.

21100020103011 is a deficient number, since it is larger than the sum of its proper divisors (7065748492989).

21100020103011 is a wasteful number, since it uses less digits than its factorization.

21100020103011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121318.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21100020103011 its reverse (11030102000112), we get a palindrome (32130122103123).

The spelling of 21100020103011 in words is "twenty-one trillion, one hundred billion, twenty million, one hundred three thousand, eleven".