221212002 has 32 divisors (see below), whose sum is σ = 489452544. Its totient is φ = 66088400.

The previous prime is 221211989. The next prime is 221212009. The reversal of 221212002 is 200212122.

It is not an unprimeable number, because it can be changed into a prime (221212009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18918 + ... + 28289.

It is an arithmetic number, because the mean of its divisors is an integer number (15295392).

Almost surely, 2^221212002 is an apocalyptic number.

221212002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221212002 is an abundant number, since it is smaller than the sum of its proper divisors (268240542).

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

221212002 is a wasteful number, since it uses less digits than its factorization.

221212002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47294.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 221212002 is about 14873.1974370006. The cubic root of 221212002 is about 604.7876239297.

Adding to 221212002 its reverse (200212122), we get a palindrome (421424124).

The spelling of 221212002 in words is "two hundred twenty-one million, two hundred twelve thousand, two".