212222020555 has 16 divisors (see below), whose sum is σ = 257361068160. Its totient is φ = 167990239872.

The previous prime is 212222020547. The next prime is 212222020559. The reversal of 212222020555 is 555020222212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212222020555 - 2³ = 212222020547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212222020559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377964 + ... + 753193.

It is an arithmetic number, because the mean of its divisors is an integer number (16085066760).

Almost surely, 2^212222020555 is an apocalyptic number.

212222020555 is a deficient number, since it is larger than the sum of its proper divisors (45139047605).

212222020555 is a wasteful number, since it uses less digits than its factorization.

212222020555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131558.

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 212222020555 its reverse (555020222212), we get a palindrome (767242242767).

The spelling of 212222020555 in words is "two hundred twelve billion, two hundred twenty-two million, twenty thousand, five hundred fifty-five".