212021007126 has 16 divisors (see below), whose sum is σ = 433064185344. Its totient is φ = 69169973864.

The previous prime is 212021007097. The next prime is 212021007127. The reversal of 212021007126 is 621700120212.

It is a junction number, because it is equal to n+sod(n) for n = 212021007096 and 212021007105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021007127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375923490 + ... + 375924053.

It is an arithmetic number, because the mean of its divisors is an integer number (27066511584).

Almost surely, 2^212021007126 is an apocalyptic number.

212021007126 is an abundant number, since it is smaller than the sum of its proper divisors (221043178218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212021007126 is a wasteful number, since it uses less digits than its factorization.

212021007126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751847595.

The product of its (nonzero) digits is 672, while the sum is 24.

Adding to 212021007126 its reverse (621700120212), we get a palindrome (833721127338).

The spelling of 212021007126 in words is "two hundred twelve billion, twenty-one million, seven thousand, one hundred twenty-six".