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221012051040 = 25345111550309
BaseRepresentation
bin1100110111010101011…
…0000100010001100000
3210010110201011110210000
43031311112010101200
512110113041113130
6245310451140000
721652612303014
oct3156526042140
9703421143700
10221012051040
11858045a5140
1236a005a4600
1317ac2593281
14a9a8970544
155b37ea2260
hex3375584460

221012051040 has 240 divisors, whose sum is σ = 850896945360. Its totient is φ = 53578644480.

The previous prime is 221012051033. The next prime is 221012051077. The reversal of 221012051040 is 40150210122.

221012051040 is a `hidden beast` number, since 22 + 10 + 120 + 510 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 632595 + ... + 917714.

It is an arithmetic number, because the mean of its divisors is an integer number (3545403939).

Almost surely, 2221012051040 is an apocalyptic number.

221012051040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221012051040 is an abundant number, since it is smaller than the sum of its proper divisors (629884894320).

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

221012051040 is a wasteful number, since it uses less digits than its factorization.

221012051040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550347 (or 1550330 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 221012051040 its reverse (40150210122), we get a palindrome (261162261162).

The spelling of 221012051040 in words is "two hundred twenty-one billion, twelve million, fifty-one thousand, forty".