212102112122 has 16 divisors (see below), whose sum is σ = 326792122272. Its totient is φ = 103209546000.

The previous prime is 212102112107. The next prime is 212102112239. The reversal of 212102112122 is 221211201212.

It is a super-2 number, since 2×212102112122² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212102112122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9524129 + ... + 9546372.

It is an arithmetic number, because the mean of its divisors is an integer number (20424507642).

Almost surely, 2^212102112122 is an apocalyptic number.

212102112122 is a deficient number, since it is larger than the sum of its proper divisors (114690010150).

212102112122 is a wasteful number, since it uses less digits than its factorization.

212102112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19070653.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212102112122 its reverse (221211201212), we get a palindrome (433313313334).

The spelling of 212102112122 in words is "two hundred twelve billion, one hundred two million, one hundred twelve thousand, one hundred twenty-two".