211220433434 has 8 divisors (see below), whose sum is σ = 317120525940. Its totient is φ = 105513591456.

The previous prime is 211220433407. The next prime is 211220433503. The reversal of 211220433434 is 434334022112.

It can be written as a sum of positive squares in 2 ways, for example, as 204715527025 + 6504906409 = 452455^2 + 80653^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×211220433434² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211220433397 and 211220433406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48309899 + ... + 48314270.

Almost surely, 2^211220433434 is an apocalyptic number.

211220433434 is a deficient number, since it is larger than the sum of its proper divisors (105900092506).

211220433434 is a wasteful number, since it uses less digits than its factorization.

211220433434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96625264.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 211220433434 its reverse (434334022112), we get a palindrome (645554455546).

The spelling of 211220433434 in words is "two hundred eleven billion, two hundred twenty million, four hundred thirty-three thousand, four hundred thirty-four".