211222012012121 has 4 divisors (see below), whose sum is σ = 230424013104144. Its totient is φ = 192020010920100.

The previous prime is 211222012012117. The next prime is 211222012012211. The reversal of 211222012012121 is 121210210222112.

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 not a de Polignac number, because 211222012012121 - 2² = 211222012012117 is a prime.

It is a super-2 number, since 2×211222012012121² (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 = 211222012012093 and 211222012012102.

It is not an unprimeable number, because it can be changed into a prime (211222012011121) 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, 9601000545995 + ... + 9601000546016.

It is an arithmetic number, because the mean of its divisors is an integer number (57606003276036).

Almost surely, 2^{211222012012121} is an apocalyptic number.

It is an amenable number.

211222012012121 is a deficient number, since it is larger than the sum of its proper divisors (19202001092023).

211222012012121 is a wasteful number, since it uses less digits than its factorization.

211222012012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19202001092022.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211222012012121 its reverse (121210210222112), we get a palindrome (332432222234233).

The spelling of 211222012012121 in words is "two hundred eleven trillion, two hundred twenty-two billion, twelve million, twelve thousand, one hundred twenty-one".