21100012120101 has 8 divisors (see below), whose sum is σ = 28145523171904. Its totient is φ = 14060587907520.

The previous prime is 21100012120097. The next prime is 21100012120133. The reversal of 21100012120101 is 10102121000112.

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

It is not a de Polignac number, because 21100012120101 - 2² = 21100012120097 is a prime.

It is a super-2 number, since 2×21100012120101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100012120181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1521701716 + ... + 1521715581.

It is an arithmetic number, because the mean of its divisors is an integer number (3518190396488).

Almost surely, 2^{21100012120101} is an apocalyptic number.

It is an amenable number.

21100012120101 is a deficient number, since it is larger than the sum of its proper divisors (7045511051803).

21100012120101 is a wasteful number, since it uses less digits than its factorization.

21100012120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043419611.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21100012120101 its reverse (10102121000112), we get a palindrome (31202133120213).

The spelling of 21100012120101 in words is "twenty-one trillion, one hundred billion, twelve million, one hundred twenty thousand, one hundred one".