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21121023420412 = 22291091670438423
BaseRepresentation
bin1001100110101100111110…
…00110010010011111111100
32202210011001102210200111221
410303112133012102133330
510232021323443423122
6112530510400323124
74306641435620206
oct463263706223774
982704042720457
1021121023420412
116803415107a43
1224514900134a4
13ba291c7b4036
145303978d3776
1526961635d6c7
hex13359f1927fc

21121023420412 has 24 divisors (see below), whose sum is σ = 38587127594400. Its totient is φ = 10102811576256.

The previous prime is 21121023420403. The next prime is 21121023420487. The reversal of 21121023420412 is 21402432012112.

It is a congruent number.

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, 835206568 + ... + 835231855.

It is an arithmetic number, because the mean of its divisors is an integer number (1607796983100).

Almost surely, 221121023420412 is an apocalyptic number.

It is an amenable number.

21121023420412 is a deficient number, since it is larger than the sum of its proper divisors (17466104173988).

21121023420412 is a wasteful number, since it uses less digits than its factorization.

21121023420412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670438565 (or 1670438563 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21121023420412 its reverse (21402432012112), we get a palindrome (42523455432524).

The spelling of 21121023420412 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-three million, four hundred twenty thousand, four hundred twelve".

Divisors: 1 2 4 29 58 109 116 218 436 3161 6322 12644 1670438423 3340876846 6681753692 48442714267 96885428534 182077788107 193770857068 364155576214 728311152428 5280255855103 10560511710206 21121023420412