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1220221002002 = 21497013583873
BaseRepresentation
bin10001110000011010110…
…101101110000100010010
311022122121022002102222112
4101300122311232010102
5124443003034031002
62332321202505322
7154105133245442
oct21603265560422
94278538072875
101220221002002
11430546a431a2
121785a1665242
138b0b29c1152
14430b7cdc122
1521b1a05d852
hex11c1ad6e112

1220221002002 has 16 divisors (see below), whose sum is σ = 1842881506200. Its totient is φ = 605928348672.

The previous prime is 1220221001977. The next prime is 1220221002043. The reversal of 1220221002002 is 2002001220221.

It can be written as a sum of positive squares in 4 ways, for example, as 803319630961 + 416901371041 = 896281^2 + 645679^2 .

It is a super-3 number, since 3×12202210020023 (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1797938 + ... + 2381810.

Almost surely, 21220221002002 is an apocalyptic number.

1220221002002 is a deficient number, since it is larger than the sum of its proper divisors (622660504198).

1220221002002 is a wasteful number, since it uses less digits than its factorization.

1220221002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591037.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1220221002002 its reverse (2002001220221), we get a palindrome (3222222222223).

The spelling of 1220221002002 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, two thousand, two".

Divisors: 1 2 149 298 7013 14026 583873 1044937 1167746 2089874 86997077 173994154 4094701349 8189402698 610110501001 1220221002002