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221220200221 = 3159791531031
BaseRepresentation
bin1100111000000111000…
…0000101111100011101
3210011000012211112202221
43032001300011330131
512111024332401341
6245343244345341
721661020450646
oct3160160057435
9704005745687
10221220200221
1185901043759
1236a5a245251
1317b26741877
14a9c84746cd
155b4b3baed1
hex3381c05f1d

221220200221 has 16 divisors (see below), whose sum is σ = 235166515200. Its totient is φ = 207791391600.

The previous prime is 221220200171. The next prime is 221220200233. The reversal of 221220200221 is 122002022122.

It is a cyclic number.

It is not a de Polignac number, because 221220200221 - 27 = 221220200093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221220200195 and 221220200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220200291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621025 + ... + 910006.

It is an arithmetic number, because the mean of its divisors is an integer number (14697907200).

Almost surely, 2221220200221 is an apocalyptic number.

It is an amenable number.

221220200221 is a deficient number, since it is larger than the sum of its proper divisors (13946314979).

221220200221 is a wasteful number, since it uses less digits than its factorization.

221220200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531200.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221220200221 its reverse (122002022122), we get a palindrome (343222222343).

The spelling of 221220200221 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred thousand, two hundred twenty-one".

Divisors: 1 31 59 79 1829 2449 4661 144491 1531031 47461961 90330829 120951449 2800255699 3749494919 7136135491 221220200221