211121012213 has 4 divisors (see below), whose sum is σ = 211135849248. Its totient is φ = 211106175180.

The previous prime is 211121012147. The next prime is 211121012273. The reversal of 211121012213 is 312210121112.

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 211121012213 - 2¹² = 211121008117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211121012191 and 211121012200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121012273) 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, 7397153 + ... + 7425638.

It is an arithmetic number, because the mean of its divisors is an integer number (52783962312).

Almost surely, 2^211121012213 is an apocalyptic number.

It is an amenable number.

211121012213 is a deficient number, since it is larger than the sum of its proper divisors (14837035).

211121012213 is a wasteful number, since it uses less digits than its factorization.

211121012213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14837034.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211121012213 its reverse (312210121112), we get a palindrome (523331133325).

The spelling of 211121012213 in words is "two hundred eleven billion, one hundred twenty-one million, twelve thousand, two hundred thirteen".