212123123102 has 32 divisors (see below), whose sum is σ = 350513222400. Its totient is φ = 96272493240.

The previous prime is 212123123083. The next prime is 212123123131. The reversal of 212123123102 is 201321321212.

It is a super-2 number, since 2×212123123102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1693799 + ... + 1814717.

It is an arithmetic number, because the mean of its divisors is an integer number (10953538200).

Almost surely, 2^212123123102 is an apocalyptic number.

212123123102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212123123102 is a deficient number, since it is larger than the sum of its proper divisors (138390099298).

212123123102 is a wasteful number, since it uses less digits than its factorization.

212123123102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121613 (or 121591 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212123123102 its reverse (201321321212), we get a palindrome (413444444314).

The spelling of 212123123102 in words is "two hundred twelve billion, one hundred twenty-three million, one hundred twenty-three thousand, one hundred two".