213021223434 has 32 divisors (see below), whose sum is σ = 501226410240. Its totient is φ = 66830187456.

The previous prime is 213021223421. The next prime is 213021223469. The reversal of 213021223434 is 434322120312.

213021223434 is a `hidden beast` number, since 2 + 1 + 3 + 0 + 2 + 1 + 223 + 434 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 213021223398 and 213021223407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116023714 + ... + 116025549.

It is an arithmetic number, because the mean of its divisors is an integer number (15663325320).

Almost surely, 2^213021223434 is an apocalyptic number.

213021223434 is an abundant number, since it is smaller than the sum of its proper divisors (288205186806).

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

213021223434 is a wasteful number, since it uses less digits than its factorization.

213021223434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232049291 (or 232049285 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 213021223434 its reverse (434322120312), we get a palindrome (647343343746).

The spelling of 213021223434 in words is "two hundred thirteen billion, twenty-one million, two hundred twenty-three thousand, four hundred thirty-four".