221012134 has 16 divisors (see below), whose sum is σ = 379072800. Its totient is φ = 94670784.

The previous prime is 221012119. The next prime is 221012149. The reversal of 221012134 is 431210122.

It is an interprime number because it is at equal distance from previous prime (221012119) and next prime (221012149).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42762 + ... + 47650.

It is an arithmetic number, because the mean of its divisors is an integer number (23692050).

Almost surely, 2^221012134 is an apocalyptic number.

221012134 is a deficient number, since it is larger than the sum of its proper divisors (158060666).

221012134 is a wasteful number, since it uses less digits than its factorization.

221012134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8127.

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

The square root of 221012134 is about 14866.4768523010. The cubic root of 221012134 is about 604.6054244786.

Adding to 221012134 its reverse (431210122), we get a palindrome (652222256).

The spelling of 221012134 in words is "two hundred twenty-one million, twelve thousand, one hundred thirty-four".