212020100112121 has 4 divisors (see below), whose sum is σ = 242308685842432. Its totient is φ = 181731514381812.

The previous prime is 212020100112019. The next prime is 212020100112137. The reversal of 212020100112121 is 121211001020212.

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 212020100112121 - 2²⁷ = 212019965894393 is a prime.

It is a super-2 number, since 2×212020100112121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212020100112095 and 212020100112104.

It is not an unprimeable number, because it can be changed into a prime (212020100152121) 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 3 ways as a sum of consecutive naturals, for example, 15144292865145 + ... + 15144292865158.

It is an arithmetic number, because the mean of its divisors is an integer number (60577171460608).

Almost surely, 2^{212020100112121} is an apocalyptic number.

It is an amenable number.

212020100112121 is a deficient number, since it is larger than the sum of its proper divisors (30288585730311).

212020100112121 is an equidigital number, since it uses as much as digits as its factorization.

212020100112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30288585730310.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212020100112121 its reverse (121211001020212), we get a palindrome (333231101132333).

The spelling of 212020100112121 in words is "two hundred twelve trillion, twenty billion, one hundred million, one hundred twelve thousand, one hundred twenty-one".