221212012302 has 12 divisors (see below), whose sum is σ = 479292693360. Its totient is φ = 73737337428.

The previous prime is 221212012223. The next prime is 221212012361. The reversal of 221212012302 is 203210212122.

221212012302 is a `hidden beast` number, since 221 + 212 + 0 + 1 + 230 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 12289556239 = 221212012302 / (2 + 2 + 1 + 2 + 1 + 2 + 0 + 1 + 2 + 3 + 0 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6144778102 + ... + 6144778137.

It is an arithmetic number, because the mean of its divisors is an integer number (39941057780).

Almost surely, 2^221212012302 is an apocalyptic number.

221212012302 is an abundant number, since it is smaller than the sum of its proper divisors (258080681058).

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

221212012302 is a wasteful number, since it uses less digits than its factorization.

221212012302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12289556247 (or 12289556244 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221212012302 its reverse (203210212122), we get a palindrome (424422224424).

The spelling of 221212012302 in words is "two hundred twenty-one billion, two hundred twelve million, twelve thousand, three hundred two".