212120100034 has 4 divisors (see below), whose sum is σ = 318180150054. Its totient is φ = 106060050016.

The previous prime is 212120100013. The next prime is 212120100037. The reversal of 212120100034 is 430001021212.

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

It can be written as a sum of positive squares in only one way, i.e., 184448775625 + 27671324409 = 429475^2 + 166347^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212120099990 and 212120100017.

It is not an unprimeable number, because it can be changed into a prime (212120100037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53030025007 + ... + 53030025010.

Almost surely, 2^212120100034 is an apocalyptic number.

212120100034 is a deficient number, since it is larger than the sum of its proper divisors (106060050020).

212120100034 is a wasteful number, since it uses less digits than its factorization.

212120100034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106060050019.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 212120100034 its reverse (430001021212), we get a palindrome (642121121246).

The spelling of 212120100034 in words is "two hundred twelve billion, one hundred twenty million, one hundred thousand, thirty-four".