21012100103101 has 8 divisors (see below), whose sum is σ = 21737639901600. Its totient is φ = 20286625946160.

The previous prime is 21012100103083. The next prime is 21012100103119. The reversal of 21012100103101 is 10130100121012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21012100103083) and next prime (21012100103119).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21012100103101 - 2¹⁷ = 21012099972029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012104103101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15758691 + ... + 17039968.

It is an arithmetic number, because the mean of its divisors is an integer number (2717204987700).

Almost surely, 2^{21012100103101} is an apocalyptic number.

It is an amenable number.

21012100103101 is a deficient number, since it is larger than the sum of its proper divisors (725539798499).

21012100103101 is a wasteful number, since it uses less digits than its factorization.

21012100103101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32820779.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21012100103101 its reverse (10130100121012), we get a palindrome (31142200224113).

The spelling of 21012100103101 in words is "twenty-one trillion, twelve billion, one hundred million, one hundred three thousand, one hundred one".