212222554091 has 4 divisors (see below), whose sum is σ = 213893597952. Its totient is φ = 210551510232.

The previous prime is 212222554021. The next prime is 212222554121. The reversal of 212222554091 is 190455222212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212222554091 - 2³⁰ = 211148812267 is a prime.

It is a super-3 number, since 3×212222554091³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212222554001) 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, 835521740 + ... + 835521993.

It is an arithmetic number, because the mean of its divisors is an integer number (53473399488).

Almost surely, 2^212222554091 is an apocalyptic number.

212222554091 is a deficient number, since it is larger than the sum of its proper divisors (1671043861).

212222554091 is a wasteful number, since it uses less digits than its factorization.

212222554091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671043860.

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 212222554091 in words is "two hundred twelve billion, two hundred twenty-two million, five hundred fifty-four thousand, ninety-one".