101012211200021 has 4 divisors (see below), whose sum is σ = 110195139490944. Its totient is φ = 91829282909100.

The previous prime is 101012211200011. The next prime is 101012211200039. The reversal of 101012211200021 is 120002112210101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-101012211200021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101012211199969 and 101012211200005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101012211200011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4591464145445 + ... + 4591464145466.

It is an arithmetic number, because the mean of its divisors is an integer number (27548784872736).

Almost surely, 2^{101012211200021} is an apocalyptic number.

101012211200021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101012211200021 is a deficient number, since it is larger than the sum of its proper divisors (9182928290923).

101012211200021 is an equidigital number, since it uses as much as digits as its factorization.

101012211200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9182928290922.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101012211200021 its reverse (120002112210101), we get a palindrome (221014323410122).

The spelling of 101012211200021 in words is "one hundred one trillion, twelve billion, two hundred eleven million, two hundred thousand, twenty-one".