100211211010021 has 4 divisors (see below), whose sum is σ = 101479707352000. Its totient is φ = 98942714668044.

The previous prime is 100211211010019. The next prime is 100211211010061. The reversal of 100211211010021 is 120010112112001.

It is a happy number.

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 cyclic number.

It is not a de Polignac number, because 100211211010021 - 2¹ = 100211211010019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100211211009983 and 100211211010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100211211010061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634248170871 + ... + 634248171028.

It is an arithmetic number, because the mean of its divisors is an integer number (25369926838000).

Almost surely, 2^{100211211010021} is an apocalyptic number.

It is an amenable number.

100211211010021 is a deficient number, since it is larger than the sum of its proper divisors (1268496341979).

100211211010021 is an equidigital number, since it uses as much as digits as its factorization.

100211211010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268496341978.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 100211211010021 its reverse (120010112112001), we get a palindrome (220221323122022).

The spelling of 100211211010021 in words is "one hundred trillion, two hundred eleven billion, two hundred eleven million, ten thousand, twenty-one".