211220104134 has 32 divisors (see below), whose sum is σ = 478879591680. Its totient is φ = 61570232352.

The previous prime is 211220104129. The next prime is 211220104171. The reversal of 211220104134 is 431401022112.

It is a super-2 number, since 2×211220104134² (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 211220104134.

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, 71260362 + ... + 71263325.

It is an arithmetic number, because the mean of its divisors is an integer number (14964987240).

Almost surely, 2^211220104134 is an apocalyptic number.

211220104134 is an abundant number, since it is smaller than the sum of its proper divisors (267659487546).

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

211220104134 is a wasteful number, since it uses less digits than its factorization.

211220104134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142523724.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 211220104134 its reverse (431401022112), we get a palindrome (642621126246).

The spelling of 211220104134 in words is "two hundred eleven billion, two hundred twenty million, one hundred four thousand, one hundred thirty-four".