221415246712 has 128 divisors (see below), whose sum is σ = 477245260800. Its totient is φ = 96201853440.

The previous prime is 221415246677. The next prime is 221415246719. The reversal of 221415246712 is 217642514122.

It is a super-2 number, since 2×221415246712² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221415246719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21514464 + ... + 21524752.

It is an arithmetic number, because the mean of its divisors is an integer number (3728478600).

Almost surely, 2^221415246712 is an apocalyptic number.

221415246712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221415246712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238622630400).

221415246712 is an abundant number, since it is smaller than the sum of its proper divisors (255830014088).

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

221415246712 is a wasteful number, since it uses less digits than its factorization.

221415246712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10418 (or 10392 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The spelling of 221415246712 in words is "two hundred twenty-one billion, four hundred fifteen million, two hundred forty-six thousand, seven hundred twelve".