221369012370 has 576 divisors, whose sum is σ = 706097927808. Its totient is φ = 49679308800.

The previous prime is 221369012339. The next prime is 221369012393. The reversal of 221369012370 is 73210963122.

221369012370 is a `hidden beast` number, since 2 + 213 + 69 + 0 + 12 + 370 = 666.

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 287 ways as a sum of consecutive naturals, for example, 334899840 + ... + 334900500.

It is an arithmetic number, because the mean of its divisors is an integer number (1225864458).

Almost surely, 2^221369012370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221369012370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353048963904).

221369012370 is an abundant number, since it is smaller than the sum of its proper divisors (484728915438).

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

221369012370 is a wasteful number, since it uses less digits than its factorization.

221369012370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

Adding to 221369012370 its reverse (73210963122), we get a palindrome (294579975492).

The spelling of 221369012370 in words is "two hundred twenty-one billion, three hundred sixty-nine million, twelve thousand, three hundred seventy".