221012196 has 24 divisors (see below), whose sum is σ = 519635424. Its totient is φ = 73107840.

The previous prime is 221012191. The next prime is 221012201. The reversal of 221012196 is 691210122.

It is an interprime number because it is at equal distance from previous prime (221012191) and next prime (221012201).

It is not an unprimeable number, because it can be changed into a prime (221012191) 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, 68725 + ... + 71868.

It is an arithmetic number, because the mean of its divisors is an integer number (21651476).

Almost surely, 2^221012196 is an apocalyptic number.

It is an amenable number.

221012196 is an abundant number, since it is smaller than the sum of its proper divisors (298623228).

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

221012196 is a wasteful number, since it uses less digits than its factorization.

221012196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140731 (or 140729 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 221012196 is about 14866.4789375292. The cubic root of 221012196 is about 604.6054810148.

The spelling of 221012196 in words is "two hundred twenty-one million, twelve thousand, one hundred ninety-six".