221274072140 has 72 divisors (see below), whose sum is σ = 511738599120. Its totient is φ = 80308990080.

The previous prime is 221274072127. The next prime is 221274072211. The reversal of 221274072140 is 41270472122.

It is a junction number, because it is equal to n+sod(n) for n = 221274072097 and 221274072106.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1178246 + ... + 1353074.

Almost surely, 2^221274072140 is an apocalyptic number.

221274072140 is a gapful number since it is divisible by the number (20) 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 221274072140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255869299560).

221274072140 is an abundant number, since it is smaller than the sum of its proper divisors (290464526980).

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

221274072140 is a wasteful number, since it uses less digits than its factorization.

221274072140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175383 (or 175370 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The spelling of 221274072140 in words is "two hundred twenty-one billion, two hundred seventy-four million, seventy-two thousand, one hundred forty".